using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;
using System;
using System.Collections;
using System.Collections.Generic;
using OpenCVForUnity.CoreModule;
using OpenCVForUnity.UnityUtils;
using Range = OpenCVForUnity.CoreModule.Range;

namespace OpenCVForUnityExample
{
    /// <summary>
    /// Mat Basic Processing Example
    /// </summary>
    public class MatBasicProcessingExample : MonoBehaviour
    {
        public ScrollRect exampleCodeScrollRect;
        public UnityEngine.UI.Text exampleCodeText;
        public ScrollRect executionResultScrollRect;
        public UnityEngine.UI.Text executionResultText;

        // Use this for initialization
        IEnumerator Start ()
        {
            // fix the screen orientation.
            Screen.orientation = ScreenOrientation.LandscapeLeft;
            // wait for the screen orientation to change.
            yield return null;
        }

        // Update is called once per frame
        void Update ()
        {

        }

        /// <summary>
        /// Raises the destroy event.
        /// </summary>
        void OnDestroy ()
        {
            Screen.orientation = ScreenOrientation.AutoRotation;
        }

        private void UpdateScrollRect ()
        {
            exampleCodeScrollRect.verticalNormalizedPosition = executionResultScrollRect.verticalNormalizedPosition = 1f;
        }

        public void OnBackButtonClick ()
        {
            SceneManager.LoadScene ("OpenCVForUnityExample");
        }


        public void OnInitializationExampleButtonClick ()
        {
            //
            // initialization example
            //

            // 3x3 matrix (set array value)
            Mat mat1 = new Mat (3, 3, CvType.CV_64FC1);
            mat1.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
            Debug.Log ("mat1=" + mat1.dump ());

            // 2x2 rotation matrix
            double angle = 30, a = Math.Cos (angle * Math.PI / 180), b = Math.Sin (angle * Math.PI / 180);
            Mat mat2 = new Mat (2, 2, CvType.CV_64FC1);
            mat2.put (0, 0, a, -b, b, a);
            Debug.Log ("mat2=" + mat2.dump ());

            // 5x5 all 1’s matrix
            Mat mat3 = Mat.ones (5, 5, CvType.CV_64FC1);
            Debug.Log ("mat3=" + mat3.dump ());

            // 5x5 all zero’s matrix
            Mat mat4 = Mat.zeros (5, 5, CvType.CV_64FC1);
            Debug.Log ("mat4=" + mat4.dump ());

            // 5x5 identity matrix
            Mat mat5 = Mat.eye (5, 5, CvType.CV_64FC1);
            Debug.Log ("mat5=" + mat5.dump ());

            // 3x3 initialize with a constant
            Mat mat6 = new Mat (3, 3, CvType.CV_64FC1, new Scalar (5));
            Debug.Log ("mat6=" + mat6.dump ());

            // 3x2 initialize with a uniform distribution random number
            Mat mat7 = new Mat (3, 2, CvType.CV_8UC1);
            Core.randu (mat7, 0, 256);
            Debug.Log ("mat7=" + mat7.dump ());

            // 3x2 initialize with a normal distribution random number
            Mat mat8 = new Mat (3, 2, CvType.CV_8UC1);
            Core.randn (mat8, 128, 10);
            Debug.Log ("mat8=" + mat8.dump ());

            exampleCodeText.text = @"
            //
            // initialization example
            //

            // 3x3 matrix (set array value)
            Mat mat1 = new Mat (3, 3, CvType.CV_64FC1);
            mat1.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
            Debug.Log (""mat1="" + mat1.dump());

            // 2x2 rotation matrix
            double angle = 30, a = Math.Cos(angle*Math.PI/180), b = Math.Sin(angle*Math.PI/180);
            Mat mat2 = new Mat (2, 2, CvType.CV_64FC1);
            mat2.put (0, 0, a, -b, b, a);
            Debug.Log (""mat2="" + mat2.dump());

            // 5x5 all 1’s matrix
            Mat mat3 = Mat.ones(5, 5, CvType.CV_64FC1);
            Debug.Log (""mat3="" + mat3.dump());

            // 5x5 all zero’s matrix
            Mat mat4 = Mat.zeros(5, 5, CvType.CV_64FC1);
            Debug.Log (""mat4="" + mat4.dump());

            // 5x5 identity matrix
            Mat mat5 = Mat.eye(5, 5, CvType.CV_64FC1);
            Debug.Log (""mat5="" + mat5.dump());

            // 3x3 initialize with a constant
            Mat mat6 = new Mat (3, 3, CvType.CV_64FC1, new Scalar(5));
            Debug.Log (""mat6="" + mat6.dump());

            // 3x2 initialize with a uniform distribution random number
            Mat mat7 = new Mat (3, 2, CvType.CV_8UC1);
            Core.randu (mat7, 0, 256);
            Debug.Log (""mat7="" + mat7.dump());

            // 3x2 initialize with a normal distribution random number
            Mat mat8 = new Mat (3, 2, CvType.CV_8UC1);
            Core.randn (mat8, 128, 10);
            Debug.Log (""mat8="" + mat8.dump());
            ";

            executionResultText.text = "mat1=" + mat1.dump () + "\n";
            executionResultText.text += "mat2=" + mat2.dump () + "\n";
            executionResultText.text += "mat3=" + mat3.dump () + "\n";
            executionResultText.text += "mat4=" + mat4.dump () + "\n";
            executionResultText.text += "mat5=" + mat5.dump () + "\n";
            executionResultText.text += "mat6=" + mat6.dump () + "\n";
            executionResultText.text += "mat7=" + mat7.dump () + "\n";
            executionResultText.text += "mat8=" + mat8.dump () + "\n";

            UpdateScrollRect ();
        }


        public void OnMultiChannelExampleButtonClick ()
        {
            //
            // multi channel example
            //

            // 64F, channels=1, 3x3
            Mat mat1 = new Mat (3, 3, CvType.CV_64FC1);
            Debug.Log ("mat1");
            Debug.Log ("   dim:" + mat1.dims () + " elemSize1:" + mat1.elemSize1 () + " channel:" + mat1.channels ());

            // 64F, channels=10, 3x3
            Debug.Log ("mat2");
            Mat mat2 = new Mat (3, 3, CvType.CV_64FC (10));
            Debug.Log ("   dim:" + mat2.dims () + " elemSize1:" + mat2.elemSize1 () + " channels:" + mat2.channels ());

            exampleCodeText.text = @"
            //
            // multi channel example
            //

            // 64F, channels=1, 3x3
            Mat mat1 = new Mat (3, 3, CvType.CV_64FC1);
            Debug.Log (""mat1"");
            Debug.Log (""   dim:"" + mat1.dims() + "" elemSize1:"" + mat1.elemSize1() + "" channel:"" + mat1.channels());

            // 64F, channels=10, 3x3
            Debug.Log (""mat2"");
            Mat mat2 = new Mat (3, 3, CvType.CV_64FC(10));
            Debug.Log (""   dim:"" + mat2.dims() + "" elemSize1:"" + mat2.elemSize1() + "" channels:"" + mat2.channels());
            ";

            executionResultText.text = "mat1" + "\n";
            executionResultText.text += "   dim:" + mat1.dims () + " elemSize1:" + mat1.elemSize1 () + " channels:" + mat1.channels () + "\n";
            executionResultText.text += "mat2" + "\n";
            executionResultText.text += "   dim:" + mat2.dims () + " elemSize1" + mat2.elemSize1 () + " channels:" + mat2.channels () + "\n";

            UpdateScrollRect ();
        }

        public void OnDumpExampleButtonClick ()
        {
            //
            // dump example
            //

            // 8U, channels=1, 3x3
            Mat mat1 = new Mat (3, 3, CvType.CV_8UC1, new Scalar (1));

            // 8U, channels=4, 3x3
            Mat mat2 = new Mat (3, 3, CvType.CV_8UC4, new Scalar (1, 2, 3, 4));

            // dump
            Debug.Log ("mat1=" + mat1);
            Debug.Log ("mat1.dump()=" + mat1.dump ());
            Debug.Log ("mat1=" + mat2);
            Debug.Log ("mat2.dump()=" + mat2.dump ());

            exampleCodeText.text = @"
            //
            // dump example
            //

            // 8U, channels=1, 3x3
            Mat mat1 = new Mat (3, 3, CvType.CV_8UC1, new Scalar(1));

            // 8U, channels=4, 3x3
            Mat mat2 = new Mat (3, 3, CvType.CV_8UC4, new Scalar(1, 2, 3, 4));

            // dump
            Debug.Log (""mat1="" + mat1);
            Debug.Log (""mat1.dump()="" + mat1.dump());
            Debug.Log (""mat1="" + mat2);
            Debug.Log (""mat2.dump()="" + mat2.dump());
            ";

            executionResultText.text = "mat1=" + mat1 + "\n";
            executionResultText.text += "mat1.dump()=" + mat1.dump () + "\n";
            executionResultText.text += "mat2=" + mat2 + "\n";
            executionResultText.text += "mat2.dump()=" + mat2.dump () + "\n";

            UpdateScrollRect ();
        }

        public void OnCVExceptionHandlingExampleButtonClick ()
        {
            //
            // CVException handling example
            //

            // 32F, channels=1, 3x3
            Mat m1 = new Mat (3, 3, CvType.CV_32FC1);
            m1.put (0, 0, 1.0f, 2.0f, 3.0f, 4.0f, 5.0f, 6.0f, 7.0f, 8.0f, 9.0f);

            // 8U, channels=1, 3x3
            Mat m2 = new Mat (3, 3, CvType.CV_8UC1);
            m2.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);

            // dump
            Debug.Log ("m1=" + m1);
            Debug.Log ("m1.dump()=" + m1.dump ());
            Debug.Log ("m2=" + m2);
            Debug.Log ("m2.dump()=" + m2.dump ());

            executionResultText.text = "m1=" + m1 + "\n";
            executionResultText.text += "m1.dump()=" + m1.dump () + "\n";
            executionResultText.text += "m2=" + m2 + "\n";
            executionResultText.text += "m2.dump()=" + m2.dump () + "\n";

            // CVException handling
            // Publish CVException to Debug.LogError.
            Utils.setDebugMode (true, false);

            Mat m3 = m1 / m2; // element type is different.
            Debug.Log ("m3=" + m3);

            Utils.setDebugMode (false);

            // Throw CVException.
            Utils.setDebugMode (true, true);
            try {
                Mat m4 = m1 / m2; // element type is different.
                Debug.Log ("m4=" + m4);
            } catch (Exception e) {
                Debug.Log ("CVException: " + e);
                executionResultText.text += "CVException: " + e + "\n";
            }
            Utils.setDebugMode (false);


            exampleCodeText.text = @"
            //
            // CVException handling example
            //

            // 32F, channels=1, 3x3
            Mat m1 = new Mat (3, 3, CvType.CV_32FC1);
            m1.put (0, 0, 1.0f, 2.0f, 3.0f, 4.0f, 5.0f, 6.0f, 7.0f, 8.0f, 9.0f);

            // 8U, channels=1, 3x3
            Mat m2 = new Mat (3, 3, CvType.CV_8UC1);
            m2.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);

            // dump
            Debug.Log (""m1="" + m1);
            Debug.Log (""m1.dump()="" + m1.dump ());
            Debug.Log (""m2="" + m2);
            Debug.Log (""m2.dump()="" + m2.dump ());

            #if UNITY_STANDALONE || UNITY_EDITOR
            // Publish CVException to Debug.LogError.
            Utils.setDebugMode (true, false);

            Mat m3 = m1 / m2;
            Debug.Log(""m3="" + m3);

            Utils.setDebugMode (false);

            // Throw CVException.
            Utils.setDebugMode (true, true);
            try
            {
                Mat m4 = m1 / m2;
                Debug.Log(""m4="" + m4);
            }
            catch (Exception e)
            {
                Debug.Log (""CVException: "" + e);
            }
            Utils.setDebugMode (false);
            #else
            Debug.Log (""The setDebugMode method is only supported on WIN, MAC and LINUX."");
            #endif
            ";

            UpdateScrollRect ();
        }

        public void OnPropertyExampleButtonClick ()
        {
            //
            // property example
            //

            // 64F, channels=1, 3x4
            Mat mat1 = new Mat (3, 3, CvType.CV_64FC1);

            // number of rows
            Debug.Log ("rows:" + mat1.rows ());
            // number of columns
            Debug.Log ("cols:" + mat1.cols ());
            // number of dimensions
            Debug.Log ("dims:" + mat1.dims ());
            // size
            Debug.Log ("size[]:" + mat1.size ().width + ", " + mat1.size ().height);
            // bit depth ID
            Debug.Log ("depth (ID):" + mat1.depth () + "(=" + CvType.CV_64F + ")");
            // number of channels
            Debug.Log ("channels:" + mat1.channels ());
            // size of one element
            Debug.Log ("elemSize:" + mat1.elemSize () + "[byte]");
            // size for one channel in one element
            Debug.Log ("elemSize1 (elemSize/channels):" + mat1.elemSize1 () + "[byte]");
            // total number of elements
            Debug.Log ("total:" + mat1.total ());
            // total number of channels within one step
            Debug.Log ("step1 (step/elemSize1):" + mat1.step1 ());
            // is the data continuous?
            Debug.Log ("isContinuous:" + mat1.isContinuous ());
            // is it a submatrix?
            Debug.Log ("isSubmatrix:" + mat1.isSubmatrix ());
            // is the data empty?
            Debug.Log ("empty:" + mat1.empty ());

            exampleCodeText.text = @"
            //
            // property example
            //

            // 64F, channels=1, 3x4
            Mat mat1 = new Mat (3, 3, CvType.CV_64FC1);

            // number of rows
            Debug.Log (""rows:"" + mat1.rows());
            // number of columns
            Debug.Log (""cols:"" + mat1.cols());
            // number of dimensions
            Debug.Log (""dims:"" + mat1.dims());
            // size
            Debug.Log (""size[]:"" + mat1.size().width + "", "" + mat1.size().height);
            // bit depth ID
            Debug.Log (""depth (ID):"" + mat1.depth() + ""(="" + CvType.CV_64F + "")"");
            // number of channels
            Debug.Log (""channels:"" + mat1.channels());
            // size of one element
            Debug.Log (""elemSize:"" + mat1.elemSize() + ""[byte]"");
            // size for one channel in one element
            Debug.Log (""elemSize1 (elemSize/channels):"" + mat1.elemSize1() + ""[byte]"");
            // total number of elements
            Debug.Log (""total:"" + mat1.total());
            // total number of channels within one step
            Debug.Log (""step1 (step/elemSize1):"" + mat1.step1());
            // is the data continuous?
            Debug.Log (""isContinuous:"" + mat1.isContinuous());
            // is it a submatrix?
            Debug.Log (""isSubmatrix:"" + mat1.isSubmatrix());
            // is the data empty?
            Debug.Log (""empty:"" + mat1.empty());
            ";

            executionResultText.text = "rows:" + mat1.rows () + "\n";
            executionResultText.text += "cols:" + mat1.cols () + "\n";
            executionResultText.text += "dims:" + mat1.dims () + "\n";
            executionResultText.text += "size[]:" + mat1.size ().width + ", " + mat1.size ().height + "\n";
            executionResultText.text += "depth (ID):" + mat1.depth () + "(=" + CvType.CV_64F + ")" + "\n";
            executionResultText.text += "channels:" + mat1.channels () + "\n";
            executionResultText.text += "elemSize:" + mat1.elemSize () + "\n";
            executionResultText.text += "elemSize1 (elemSize/channels):" + mat1.elemSize1 () + "\n";
            executionResultText.text += "total:" + mat1.total () + "\n";
            executionResultText.text += "step1 (step/elemSize1):" + mat1.step1 () + "\n";
            executionResultText.text += "isContinuous:" + mat1.isContinuous () + "\n";
            executionResultText.text += "isSubmatrix:" + mat1.isSubmatrix () + "\n";
            executionResultText.text += "empty:" + mat1.empty () + "\n";

            UpdateScrollRect ();
        }

        public void OnFourArithmeticOperationExampleButtonClick ()
        {
            //
            // four arithmetic operation example
            //

            // 64F, channels=1, 3x3
            Mat m1 = new Mat (3, 3, CvType.CV_64FC1);
            m1.put (0, 0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0);

            Debug.Log ("m1=" + m1.dump ());
            executionResultText.text = "m1=" + m1.dump () + "\n";

            // matrix and scalar
            Mat m2 = m1 + new Scalar (3);
            Mat m3 = m1 - new Scalar (3);
            Mat m4 = m1 * 3; //scaling
            Mat m5 = m1 / 3;

            Debug.Log ("m1+3=" + m2.dump ());
            Debug.Log ("m1-3=" + m3.dump ());
            Debug.Log ("m1*3=" + m4.dump ());
            Debug.Log ("m1/3=" + m5.dump ());

            executionResultText.text += "m1+3=" + m2.dump () + "\n";
            executionResultText.text += "m1-3=" + m3.dump () + "\n";
            executionResultText.text += "m1*3=" + m4.dump () + "\n";
            executionResultText.text += "m1/3=" + m5.dump () + "\n";

            // matrix and matrix
            Mat m6 = m1 + m1;
            Mat m7 = m1.mul (m2);
            Mat m8 = m1.mul (m2, 2); //add scaling factor

            Debug.Log ("m1+m1=" + m6.dump ());
            Debug.Log ("m1.mul(m2)=" + m7.dump ());
            Debug.Log ("m1.mul(m2, 2)=" + m8.dump ());

            executionResultText.text += "m1+m1=" + m6.dump () + "\n";
            executionResultText.text += "m1.mul(m2)=" + m7.dump () + "\n";
            executionResultText.text += "m1.mul(m2, 2)=" + m8.dump () + "\n";

            // CVException handling
            // 8U, channels=1, 3x3
            Mat m9 = new Mat (3, 3, CvType.CV_8UC1);
            m9.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
            // 64F, channels=1, 3x3
            Mat m10 = new Mat (2, 2, CvType.CV_64FC1);
            m10.put (0, 0, 1.0, 2.0, 3.0, 4.0);


            // Publish CVException to Debug.LogError.
            Utils.setDebugMode (true, false);

            Mat m11 = m1 / m9; // element type is different.
            Debug.Log ("m1/m9=" + m11);
            executionResultText.text += "m1/m9=" + m11.dump () + "\n";

            Mat m12 = m1 / m10; // matrix size is different.
            Debug.Log ("m1/m10=" + m12);
            executionResultText.text += "m1/m10=" + m12.dump () + "\n";

            Utils.setDebugMode (false);



            exampleCodeText.text = @"
            //
            // four arithmetic operation example
            //

            // 64F, channels=1, 3x3
            Mat m1 = new Mat (3, 3, CvType.CV_64FC1);
            m1.put (0, 0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0);

            Debug.Log (""m1="" + m1.dump ());
            executionResultText.text = ""m1="" + m1.dump () + ""\n"";

            // matrix and scalar
            Mat m2 = m1 + new Scalar (3);
            Mat m3 = m1 - new Scalar (3);
            Mat m4 = m1 * 3; //scaling
            Mat m5 = m1 / 3;

            Debug.Log (""m1+3="" + m2.dump ());
            Debug.Log (""m1-3="" + m3.dump ());
            Debug.Log (""m1*3="" + m4.dump ());
            Debug.Log (""m1/3="" + m5.dump ());

            executionResultText.text += ""m1+3="" + m2.dump () + ""\n"";
            executionResultText.text += ""m1-3="" + m3.dump () + ""\n"";
            executionResultText.text += ""m1*3="" + m4.dump () + ""\n"";
            executionResultText.text += ""m1/3="" + m5.dump () + ""\n"";

            // matrix and matrix
            Mat m6 = m1 + m1;
            Mat m7 = m1.mul (m2);
            Mat m8 = m1.mul (m2, 2); //add scaling factor

            Debug.Log (""m1+m1="" + m6.dump ());
            Debug.Log (""m1.mul(m2)="" + m7.dump ());
            Debug.Log (""m1.mul(m2, 2)="" + m8.dump ());

            executionResultText.text += ""m1+m1="" + m6.dump () + ""\n"";
            executionResultText.text += ""m1.mul(m2)="" + m7.dump () + ""\n"";
            executionResultText.text += ""m1.mul(m2, 2)="" + m8.dump () + ""\n"";

            // CVException handling
            // 8U, channels=1, 3x3
            Mat m9 = new Mat (3, 3, CvType.CV_8UC1);
            m9.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
            // 64F, channels=1, 3x3
            Mat m10 = new Mat (2, 2, CvType.CV_64FC1);
            m10.put (0, 0, 1.0, 2.0, 3.0, 4.0);


            // Publish CVException to Debug.LogError.
            Utils.setDebugMode (true, false);

            Mat m11 = m1 / m9; // element type is different.
            Debug.Log (""m1/m9="" + m11);
            executionResultText.text += ""m1/m9="" + m11.dump () + ""\n"";

            Mat m12 = m1 / m10; // matrix size is different.
            Debug.Log (""m1/m10="" + m12);
            executionResultText.text += ""m1/m10="" + m12.dump () + ""\n"";

            Utils.setDebugMode (false);
            ";

            UpdateScrollRect ();
        }

        public void OnConvertToExampleButtonClick ()
        {
            //
            // convertTo example
            //

            // 64F, channels=1, 3x3
            Mat m1 = new Mat (3, 3, CvType.CV_64FC1);
            m1.put (0, 0, 1.1, 1.2, 1.3, 2.1, 2.2, 2.3, 3.1, 3.2, 3.3);
            Debug.Log ("m1=" + m1.dump ());

            // dst mat, type
            Mat m2 = new Mat ();
            m1.convertTo (m2, CvType.CV_8U);
            Debug.Log ("m2=" + m2.dump ());

            // dst mat, type, scale factor, added to the scaled value
            Mat m3 = new Mat ();
            m1.convertTo (m3, CvType.CV_8U, 2, 10);
            Debug.Log ("m3=" + m3.dump ());

            exampleCodeText.text = @"
            //
            // convertTo example
            //

            // 64F, channels=1, 3x3
            Mat m1 = new Mat (3, 3, CvType.CV_64FC1);
            m1.put (0, 0, 1.1, 1.2, 1.3, 2.1, 2.2, 2.3, 3.1, 3.2, 3.3);
            Debug.Log (""m1="" + m1.dump());

            // dst mat, type
            Mat m2 = new Mat ();
            m1.convertTo (m2, CvType.CV_8U);
            Debug.Log (""m2="" + m2.dump());

            // dst mat, type, scale factor, added to the scaled value
            Mat m3 = new Mat ();
            m1.convertTo (m3, CvType.CV_8U, 2, 10);
            Debug.Log (""m3="" + m3.dump());
            ";

            executionResultText.text = "m1=" + m1.dump () + "\n";
            executionResultText.text += "m2=" + m2.dump () + "\n";
            executionResultText.text += "m3=" + m3.dump () + "\n";

            UpdateScrollRect ();
        }

        public void OnReshapeExampleButtonClick ()
        {
            //
            // reshape example
            //

            // 64F, channels=1, 3x4
            Mat m1 = new Mat (3, 4, CvType.CV_64FC1);
            m1.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12);
            Debug.Log ("m1=" + m1.dump ());
            Debug.Log ("ch=" + m1.channels ());

            // channels=2, 3x2
            Mat m2 = m1.reshape (2);
            Debug.Log ("m2=" + m2.dump ());
            Debug.Log ("ch=" + m2.channels ());

            // channels=1, 2x6
            Mat m3 = m1.reshape (1, 2);
            Debug.Log ("m3=" + m3.dump ());
            Debug.Log ("ch=" + m3.channels ());

            exampleCodeText.text = @"
            //
            // reshape example
            //

            // 64F, channels=1, 3x4
            Mat m1 = new Mat (3, 4, CvType.CV_64FC1);
            m1.put (0, 0, 1,2,3,4,5,6,7,8,9,10,11,12);
            Debug.Log (""m1="" + m1.dump());
            Debug.Log (""ch="" + m1.channels());

            // channels=2, 3x2
            Mat m2 = m1.reshape (2);
            Debug.Log (""m2="" + m2.dump());
            Debug.Log (""ch="" + m2.channels());

            // channels=1, 2x6
            Mat m3 = m1.reshape (1, 2);
            Debug.Log (""m3="" + m3.dump());
            Debug.Log (""ch="" + m3.channels());
            ";

            executionResultText.text = "m1=" + m1.dump () + "\n";
            executionResultText.text += "ch=" + m1.channels () + "\n";
            executionResultText.text += "m2=" + m2.dump () + "\n";
            executionResultText.text += "ch=" + m2.channels () + "\n";
            executionResultText.text += "m3=" + m3.dump () + "\n";
            executionResultText.text += "ch=" + m3.channels () + "\n";

            UpdateScrollRect ();
        }

        public void OnRangeExampleButtonClick ()
        {
            //
            // range example
            //

            // 64F, channels=1, 3x3
            Mat m1 = new Mat (3, 3, CvType.CV_64FC1);
            m1.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
            Debug.Log ("m1=" + m1.dump ());

            // all rows
            Debug.Log ("m1.rowRange(Range.all())=" + m1.rowRange (Range.all ()).dump ());

            // rowRange(0,2)
            Debug.Log ("m1.rowRange(new Range(0,2))=" + m1.rowRange (new Range (0, 2)).dump ());

            // row(0)
            Debug.Log ("m1.row(0)=" + m1.row (0).dump ());

            // all cols
            Debug.Log ("m1.colRange(Range.all())=" + m1.colRange (Range.all ()).dump ());

            // colRange(0,2)
            Debug.Log ("m1.colRange(new Range(0,2))=" + m1.colRange (new Range (0, 2)).dump ());

            // col(0)
            Debug.Log ("m1.col(0)=" + m1.col (0).dump ());

            exampleCodeText.text = @"
            //
            // range example
            //

            // 64F, channels=1, 3x3
            Mat m1 = new Mat (3, 3, CvType.CV_64FC1);
            m1.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
            Debug.Log (""m1="" + m1.dump());

            // all rows
            Debug.Log (""m1.rowRange(Range.all())="" + m1.rowRange(Range.all()).dump());

            // rowRange(0,2)
            Debug.Log (""m1.rowRange(new Range(0,2))="" + m1.rowRange(new Range(0,2)).dump());

            // row(0)
            Debug.Log (""m1.row(0)="" + m1.row(0).dump());

            // all cols
            Debug.Log (""m1.colRange(Range.all())="" + m1.colRange(Range.all()).dump());

            // colRange(0,2)
            Debug.Log (""m1.colRange(new Range(0,2))="" + m1.colRange(new Range(0,2)).dump());

            // col(0)
            Debug.Log (""m1.col(0)="" + m1.col(0).dump());
            ";

            executionResultText.text = "m1=" + m1.dump () + "\n";
            executionResultText.text += "m1.rowRange(Range.all())=" + m1.rowRange (Range.all ()).dump () + "\n";
            executionResultText.text += "m1.rowRange(new Range(0,2))=" + m1.rowRange (new Range (0, 2)).dump () + "\n";
            executionResultText.text += "m1.row(0)=" + m1.row (0).dump () + "\n";
            executionResultText.text += "m1.colRange(Range.all())=" + m1.colRange (Range.all ()).dump () + "\n";
            executionResultText.text += "m1.colRange(new Range(0,2))=" + m1.colRange (new Range (0, 2)).dump () + "\n";
            executionResultText.text += "m1.col(0)=" + m1.col (0).dump () + "\n";

            UpdateScrollRect ();
        }

        public void OnShallowCopyAndDeepCopyExampleButtonClick ()
        {
            //
            // shallow copy and deep copy example
            //

            // 3x3 matrix
            Mat mat1 = new Mat (3, 3, CvType.CV_64FC1);
            mat1.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);

            // shallow copy
            Mat m_shallow = mat1;

            // deep copy (clone, copyTo)
            Mat m_deep1 = mat1.clone ();
            Mat m_deep2 = new Mat ();
            mat1.copyTo (m_deep2);

            Debug.Log ("mat1=" + mat1.dump ());
            Debug.Log ("m_shallow=" + m_shallow.dump ());
            Debug.Log ("m_deep1=" + m_deep1.dump ());
            Debug.Log ("m_deep2=" + m_deep2.dump ());

            executionResultText.text = "mat1=" + mat1.dump () + "\n";
            executionResultText.text += "m_shallow=" + m_shallow.dump () + "\n";
            executionResultText.text += "m_deep1=" + m_deep1.dump () + "\n";
            executionResultText.text += "m_deep2=" + m_deep2.dump () + "\n";

            // rewrite (0, 0) element of matrix mat1
            mat1.put (0, 0, 100);

            Debug.Log ("mat1=" + mat1.dump ());
            Debug.Log ("m_shallow=" + m_shallow.dump ());
            Debug.Log ("m_deep1=" + m_deep1.dump ());
            Debug.Log ("m_deep2=" + m_deep2.dump ());

            executionResultText.text += "mat1=" + mat1.dump () + "\n";
            executionResultText.text += "m_shallow=" + m_shallow.dump () + "\n";
            executionResultText.text += "m_deep1=" + m_deep1.dump () + "\n";
            executionResultText.text += "m_deep2=" + m_deep2.dump () + "\n";

            Debug.Log ("mat1.Equals(m_shallow)=" + mat1.Equals (m_shallow));
            Debug.Log ("mat1.Equals(m_deep1)=" + mat1.Equals (m_deep1));
            Debug.Log ("mat1.Equals(m_deep2)=" + mat1.Equals (m_deep2));

            executionResultText.text += "mat1.Equals(m_shallow)=" + mat1.Equals (m_shallow) + "\n";
            executionResultText.text += "mat1.Equals(m_deep1)=" + mat1.Equals (m_deep1) + "\n";
            executionResultText.text += "mat1.Equals(m_deep2)=" + mat1.Equals (m_deep2) + "\n";

            exampleCodeText.text = @"
            //
            // shallow copy and deep copy example
            //

            // 3x3 matrix
            Mat mat1 = new Mat (3, 3, CvType.CV_64FC1);
            mat1.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);

            // shallow copy
            Mat m_shallow = mat1;

            // deep copy (clone, copyTo)
            Mat m_deep1 = mat1.clone();
            Mat m_deep2 = new Mat();
            mat1.copyTo (m_deep2);

            Debug.Log (""mat1="" + mat1.dump());
            Debug.Log (""m_shallow="" + m_shallow.dump());
            Debug.Log (""m_deep1="" + m_deep1.dump());
            Debug.Log (""m_deep2="" + m_deep2.dump());

            // rewrite (0, 0) element of matrix mat1
            mat1.put(0, 0, 100);

            Debug.Log (""mat1="" + mat1.dump());
            Debug.Log (""m_shallow="" + m_shallow.dump());
            Debug.Log (""m_deep1="" + m_deep1.dump());
            Debug.Log (""m_deep2="" + m_deep2.dump());

            Debug.Log (""mat1.Equals(m_shallow)="" + mat1.Equals(m_shallow));
            Debug.Log (""mat1.Equals(m_deep1)="" + mat1.Equals(m_deep1));
            Debug.Log (""mat1.Equals(m_deep2)="" + mat1.Equals(m_deep2));
            ";

            UpdateScrollRect ();
        }

        public void OnMergeExampleButtonClick ()
        {
            //
            // simple composition: Merge example
            //

            // 2x2 matrix
            Mat m1 = new Mat (2, 2, CvType.CV_64FC1);
            m1.put (0, 0, 1.0, 2.0, 3.0, 4.0);
            Mat m2 = new Mat (2, 2, CvType.CV_64FC1);
            m2.put (0, 0, 1.1, 2.1, 3.1, 4.1);
            Mat m3 = new Mat (2, 2, CvType.CV_64FC1);
            m3.put (0, 0, 1.2, 2.2, 3.2, 4.2);

            List<Mat> mv = new List<Mat> ();
            mv.Add (m1);
            mv.Add (m2);
            mv.Add (m3);

            // merge
            Mat m_merged = new Mat ();
            Core.merge (mv, m_merged);

            // dump
            Debug.Log ("m_merged=" + m_merged.dump ());

            exampleCodeText.text = @"
            //
            // simple composition: Merge example
            //

            // 2x2 matrix
            Mat m1 = new Mat (2, 2, CvType.CV_64FC1);
            m1.put (0, 0, 1.0, 2.0, 3.0, 4.0);
            Mat m2 = new Mat (2, 2, CvType.CV_64FC1);
            m2.put (0, 0, 1.1, 2.1, 3.1, 4.1);
            Mat m3 = new Mat (2, 2, CvType.CV_64FC1);
            m3.put (0, 0, 1.2, 2.2, 3.2, 4.2);

            List<Mat> mv = new List<Mat>();
            mv.Add (m1);
            mv.Add (m2);
            mv.Add (m3);

            // merge
            Mat m_merged = new Mat();
            Core.merge (mv, m_merged);

            // dump
            Debug.Log (""m_merged="" + m_merged.dump());
            ";

            executionResultText.text = "m_merged=" + m_merged.dump () + "\n";

            UpdateScrollRect ();
        }

        public void OnMixChannelsExampleButtonClick ()
        {
            //
            // complex composition: mixChannels example
            //

            // 2x2 matrix
            Mat m1 = new Mat (2, 2, CvType.CV_64FC1);
            m1.put (0, 0, 1.0, 2.0, 3.0, 4.0);
            Mat m2 = new Mat (2, 2, CvType.CV_64FC1);
            m2.put (0, 0, 1.1, 2.1, 3.1, 4.1);
            Mat m3 = new Mat (2, 2, CvType.CV_64FC1);
            m3.put (0, 0, 1.2, 2.2, 3.2, 4.2);

            List<Mat> mv = new List<Mat> ();
            mv.Add (m1);
            mv.Add (m2);
            mv.Add (m3);

            // mat for output must be allocated.
            Mat m_mixed1 = new Mat (2, 2, CvType.CV_64FC2);
            Mat m_mixed2 = new Mat (2, 2, CvType.CV_64FC2);
            MatOfInt fromTo = new MatOfInt (0, 0, 1, 1, 1, 3, 2, 2);

            List<Mat> mixv = new List<Mat> ();
            mixv.Add (m_mixed1);
            mixv.Add (m_mixed2);

            // mix
            Core.mixChannels (mv, mixv, fromTo);

            // dump
            Debug.Log ("m_mixed1=" + m_mixed1.dump ());
            Debug.Log ("m_mixed2=" + m_mixed2.dump ());

            exampleCodeText.text = @"
            //
            // complex composition: mixChannels example
            //

            // 2x2 matrix
            Mat m1 = new Mat (2, 2, CvType.CV_64FC1);
            m1.put (0, 0, 1.0, 2.0, 3.0, 4.0);
            Mat m2 = new Mat (2, 2, CvType.CV_64FC1);
            m2.put (0, 0, 1.1, 2.1, 3.1, 4.1);
            Mat m3 = new Mat (2, 2, CvType.CV_64FC1);
            m3.put (0, 0, 1.2, 2.2, 3.2, 4.2);

            List<Mat> mv = new List<Mat>();
            mv.Add (m1);
            mv.Add (m2);
            mv.Add (m3);

            // mat for output must be allocated.
            Mat m_mixed1 = new Mat(2, 2, CvType.CV_64FC2);
            Mat m_mixed2 = new Mat(2, 2, CvType.CV_64FC2);
            MatOfInt fromTo = new MatOfInt (0,0, 1,1, 1,3, 2,2);

            List<Mat> mixv = new List<Mat> ();
            mixv.Add (m_mixed1);
            mixv.Add (m_mixed2);

            // mix
            Core.mixChannels (mv, mixv, fromTo);

            // dump
            Debug.Log (""m_mixed1="" + m_mixed1.dump());
            Debug.Log (""m_mixed2="" + m_mixed2.dump());
            ";

            executionResultText.text = "m_mixed1=" + m_mixed1.dump () + "\n";
            executionResultText.text += "m_mixed2=" + m_mixed2.dump () + "\n";

            UpdateScrollRect ();
        }

        public void OnSplitExampleButtonClick ()
        {
            //
            // split example
            //

            // channels=3, 2x3 matrix
            Mat m1 = new Mat (2, 3, CvType.CV_64FC3);
            m1.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18);

            List<Mat> planes = new List<Mat> ();

            // split
            Core.split (m1, planes);

            // dump
            foreach (Mat item in planes) {
                Debug.Log (item.dump ());
            }

            exampleCodeText.text = @"
            //
            // split example
            //

            // channels=3, 2x3 matrix
            Mat m1 = new Mat (2, 3, CvType.CV_64FC3);
            m1.put (0, 0, 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18);

            List<Mat> planes = new List<Mat>();

            // split
            Core.split (m1, planes);

            // dump
            foreach (Mat item in planes) {
                Debug.Log (item.dump());
            }
            ";

            executionResultText.text = "";
            foreach (Mat item in planes) {
                executionResultText.text += item.dump () + "\n";
            }

            UpdateScrollRect ();
        }

        public void OnReduceExampleButtonClick ()
        {
            //
            // reduce example
            //

            // 3x3 matrix
            Mat m1 = new Mat (3, 3, CvType.CV_64FC1);
            m1.put (0, 0, 1, 5, 3, 4, 2, 6, 7, 8, 9);

            Mat v1 = new Mat ();
            Mat v2 = new Mat ();
            Mat v3 = new Mat ();
            Mat v4 = new Mat ();

            // reduce 3 x 3 matrix to one row
            Core.reduce (m1, v1, 0, Core.REDUCE_SUM); // total value of each column
            Core.reduce (m1, v2, 0, Core.REDUCE_AVG); // total average value of each column
            Core.reduce (m1, v3, 0, Core.REDUCE_MIN); // minimum value of each column
            Core.reduce (m1, v4, 0, Core.REDUCE_MAX); // maximum value of each column

            // dump
            Debug.Log ("m1=" + m1.dump ());
            Debug.Log ("v1(sum)=" + v1.dump ());
            Debug.Log ("v2(avg)=" + v2.dump ());
            Debug.Log ("v3(min)=" + v3.dump ());
            Debug.Log ("v4(max)=" + v4.dump ());

            executionResultText.text = "m1=" + m1.dump () + "\n";
            executionResultText.text += "v1(sum)=" + v1.dump () + "\n";
            executionResultText.text += "v2(avg)=" + v2.dump () + "\n";
            executionResultText.text += "v3(min)=" + v3.dump () + "\n";
            executionResultText.text += "v4(max)=" + v4.dump () + "\n";

            // reduce 3 x 3 matrix to one col
            Core.reduce (m1, v1, 1, Core.REDUCE_SUM); // total value of each row
            Core.reduce (m1, v2, 1, Core.REDUCE_AVG); // total average value of row
            Core.reduce (m1, v3, 1, Core.REDUCE_MIN); // minimum value of each row
            Core.reduce (m1, v4, 1, Core.REDUCE_MAX); // maximum value of each row

            // dump
            Debug.Log ("m1=" + m1.dump ());
            Debug.Log ("v1(sum)=" + v1.dump ());
            Debug.Log ("v2(avg)=" + v2.dump ());
            Debug.Log ("v3(min)=" + v3.dump ());
            Debug.Log ("v4(max)=" + v4.dump ());

            executionResultText.text += "m1=" + m1.dump () + "\n";
            executionResultText.text += "v1(sum)=" + v1.dump () + "\n";
            executionResultText.text += "v2(avg)=" + v2.dump () + "\n";
            executionResultText.text += "v3(min)=" + v3.dump () + "\n";
            executionResultText.text += "v4(max)=" + v4.dump () + "\n";

            exampleCodeText.text = @"
            //
            // reduce example
            //

            // 3x3 matrix
            Mat m1 = new Mat (3, 3, CvType.CV_64FC1);
            m1.put (0, 0, 1, 5, 3, 4, 2, 6, 7, 8, 9);

            Mat v1 = new Mat ();
            Mat v2 = new Mat ();
            Mat v3 = new Mat ();
            Mat v4 = new Mat ();

            // reduce 3 x 3 matrix to one row
            Core.reduce (m1, v1, 0, Core.REDUCE_SUM); // total value of each column
            Core.reduce (m1, v2, 0, Core.REDUCE_AVG); // total average value of each column
            Core.reduce (m1, v3, 0, Core.REDUCE_MIN); // minimum value of each column
            Core.reduce (m1, v4, 0, Core.REDUCE_MAX); // maximum value of each column

            // dump
            Debug.Log (""m1="" + m1.dump());
            Debug.Log (""v1(sum)="" + v1.dump());
            Debug.Log (""v2(avg)="" + v2.dump());
            Debug.Log (""v3(min)="" + v3.dump());
            Debug.Log (""v4(max)="" + v4.dump());

            // reduce 3 x 3 matrix to one col
            Core.reduce (m1, v1, 1, Core.REDUCE_SUM); // total value of each row
            Core.reduce (m1, v2, 1, Core.REDUCE_AVG); // total average value of row
            Core.reduce (m1, v3, 1, Core.REDUCE_MIN); // minimum value of each row
            Core.reduce (m1, v4, 1, Core.REDUCE_MAX); // maximum value of each row

            // dump
            Debug.Log (""m1="" + m1.dump());
            Debug.Log (""v1(sum)="" + v1.dump());
            Debug.Log (""v2(avg)="" + v2.dump());
            Debug.Log (""v3(min)="" + v3.dump());
            Debug.Log (""v4(max)="" + v4.dump());
            ";

            UpdateScrollRect ();
        }

        public void OnSubmatrixExampleButtonClick ()
        {
            //
            // submatrix (ROI) example
            //

            // 3x3 matrix
            Mat m1 = new Mat (3, 3, CvType.CV_64FC1);
            m1.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
            Debug.Log ("m1=" + m1.dump ());

            executionResultText.text = "m1=" + m1.dump () + "\n";

            // get submatrix (ROI) of range (row[0_2] col[0_2])
            Mat m2 = new Mat (m1, new OpenCVForUnity.CoreModule.Rect (0, 0, 2, 2));
            Debug.Log ("m2=" + m2.dump ());
            executionResultText.text += "m2=" + m2.dump () + "\n";
            Debug.Log ("m2.submat()=" + m2.submat (0, 2, 0, 2).dump ());
            executionResultText.text += "m2.submat()=" + m2.submat (0, 2, 0, 2).dump () + "\n";

            // find the parent matrix size of the submatrix (ROI) m2 and its position in it
            Size wholeSize = new Size ();
            Point ofs = new Point ();
            m2.locateROI (wholeSize, ofs);
            Debug.Log ("wholeSize:" + wholeSize.width + "x" + wholeSize.height);
            Debug.Log ("offset:" + ofs.x + ", " + ofs.y);

            executionResultText.text += "wholeSize:" + wholeSize.width + "x" + wholeSize.height + "\n";
            executionResultText.text += "offset:" + ofs.x + ", " + ofs.y + "\n";

            // expand the range of submatrix (ROI)
            m2.adjustROI (0, 1, 0, 1);
            Debug.Log ("rows=" + m2.rows () + ", " + "cols=" + m2.cols ());
            Debug.Log ("m2=" + m2.dump ());

            executionResultText.text += "rows=" + m2.rows () + ", " + "cols=" + m2.cols () + "\n";
            executionResultText.text += "m2=" + m2.dump () + "\n";

            exampleCodeText.text = @"
            //
            // submatrix (ROI) example
            //

            // 3x3 matrix
            Mat m1 = new Mat (3, 3, CvType.CV_64FC1);
            m1.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
            Debug.Log (""m1="" + m1.dump ());

            // get submatrix (ROI) of range (row[0_2] col[0_2])
            Mat m2 = new Mat (m1, new OpenCVForUnity.CoreModule.Rect(0,0,2,2));
            Debug.Log (""m2="" + m2.dump());
            Debug.Log (""m2.submat()="" + m2.submat(0,2,0,2).dump());

            // find the parent matrix size of the submatrix (ROI) m2 and its position in it
            Size wholeSize = new Size ();
            Point ofs = new Point ();
            m2.locateROI (wholeSize, ofs);
            Debug.Log (""wholeSize:"" + wholeSize.width + ""x"" + wholeSize.height);
            Debug.Log (""offset:"" + ofs.x + "", "" + ofs.y);

            // expand the range of submatrix (ROI)
            m2.adjustROI(0, 1, 0, 1);
            Debug.Log (""rows="" + m2.rows() + "", "" + ""cols="" + m2.cols());
            Debug.Log (""m2="" + m2.dump());
            ";

            UpdateScrollRect ();
        }

        public void OnRandShuffleExampleButtonClick ()
        {
            //
            // randShuffle example
            //

            // 4x5 matrix
            Mat m1 = new Mat (4, 5, CvType.CV_64FC1);
            m1.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20);
            Debug.Log ("m1(original)=" + m1.dump ());

            executionResultText.text = "m1(original)=" + m1.dump () + "\n";

            // shuffle
            Core.randShuffle (m1, UnityEngine.Random.value);
            Debug.Log ("m1(shuffle)=" + m1.dump ());

            executionResultText.text += "m1(shuffle)=" + m1.dump () + "\n";

            // submatrix
            Mat m2 = new Mat (m1, new OpenCVForUnity.CoreModule.Rect (1, 1, 3, 2));
            Debug.Log ("m2(sub-matrix)=" + m2.dump ());

            executionResultText.text += "m2(sub-matrix)=" + m2.dump () + "\n";

            Core.randShuffle (m2, UnityEngine.Random.value);
            Debug.Log ("m2(sub-matrix)=" + m2.dump ());
            Debug.Log ("m1=" + m1.dump ());

            executionResultText.text += "m2(shuffle sub-matrix)=" + m2.dump () + "\n";
            executionResultText.text += "m1=" + m1.dump () + "\n";

            exampleCodeText.text = @"
            //
            // randShuffle example
            //

            // 4x5 matrix
            Mat m1 = new Mat (4, 5, CvType.CV_64FC1);
            m1.put (0, 0, 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20);
            Debug.Log (""m1(original)="" + m1.dump ());

            // shuffle
            Core.randShuffle (m1, UnityEngine.Random.value);
            Debug.Log (""m1(shuffle)="" + m1.dump ());

            // submatrix
            Mat m2 = new Mat (m1, new OpenCVForUnity.CoreModule.Rect(1,1,3,2));
            Debug.Log (""m2(sub-matrix)="" + m2.dump());

            Core.randShuffle (m2, UnityEngine.Random.value);
            Debug.Log (""m2(sub-matrix)="" + m2.dump());
            Debug.Log (""m1="" + m1.dump ());
            ";

            UpdateScrollRect ();
        }

        public void OnSortExampleButtonClick ()
        {
            //
            // sort example
            //

            // 5x5 matrix
            Mat m1 = new Mat (5, 5, CvType.CV_8UC1);
            Core.randu (m1, 0, 25);
            Debug.Log ("m1=" + m1.dump ());

            executionResultText.text = "m1=" + m1.dump () + "\n";

            Mat dst_mat = new Mat ();

            // sort ascending
            Core.sort (m1, dst_mat, Core.SORT_EVERY_ROW | Core.SORT_ASCENDING);
            Debug.Log ("ROW|ASCENDING:" + dst_mat.dump ());

            executionResultText.text += "ROW|ASCENDING:" + dst_mat.dump () + "\n";

            // sort descending
            Core.sort (m1, dst_mat, Core.SORT_EVERY_ROW | Core.SORT_DESCENDING);
            Debug.Log ("ROW|DESCENDING:" + dst_mat.dump ());

            executionResultText.text += "ROW|DESCENDING:" + dst_mat.dump () + "\n";

            // sort ascending
            Core.sort (m1, dst_mat, Core.SORT_EVERY_COLUMN | Core.SORT_ASCENDING);
            Debug.Log ("COLUMN|ASCENDING:" + dst_mat.dump ());

            executionResultText.text += "COLUMN|ASCENDING:" + dst_mat.dump () + "\n";

            // sort descending
            Core.sort (m1, dst_mat, Core.SORT_EVERY_COLUMN | Core.SORT_DESCENDING);
            Debug.Log ("COLUMN|DESCENDING:" + dst_mat.dump ());

            executionResultText.text += "COLUMN|DESCENDING:" + dst_mat.dump () + "\n";

            exampleCodeText.text = @"
            //
            // sort example
            //

            // 5x5 matrix
            Mat m1 = new Mat (5, 5, CvType.CV_8UC1);
            Core.randu (m1, 0, 25);
            Debug.Log (""m1="" + m1.dump ());

            executionResultText.text = ""m1="" + m1.dump() + ""\n"";

            Mat dst_mat = new Mat ();

            // sort ascending
            Core.sort (m1, dst_mat, Core.SORT_EVERY_ROW|Core.SORT_ASCENDING);
            Debug.Log (""ROW|ASCENDING:"" + dst_mat.dump ());

            // sort descending
            Core.sort (m1, dst_mat, Core.SORT_EVERY_ROW|Core.SORT_DESCENDING);
            Debug.Log (""ROW|DESCENDING:"" + dst_mat.dump ());

            // sort ascending
            Core.sort (m1, dst_mat, Core.SORT_EVERY_COLUMN|Core.SORT_ASCENDING);
            Debug.Log (""COLUMN|ASCENDING:"" + dst_mat.dump ());

            // sort descending
            Core.sort (m1, dst_mat, Core.SORT_EVERY_COLUMN|Core.SORT_DESCENDING);
            Debug.Log (""COLUMN|DESCENDING:"" + dst_mat.dump ());
            ";

            UpdateScrollRect ();
        }

        public void OnComparisonExampleButtonClick ()
        {
            //
            // comparison example
            //

            // 3x3 matrix
            Mat m1 = new Mat (3, 3, CvType.CV_64FC1);
            m1.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
            Mat m2 = new Mat (3, 3, CvType.CV_64FC1);
            m2.put (0, 0, 9, 8, 7, 6, 5, 4, 3, 2, 1);

            Debug.Log ("m1=" + m1.dump ());
            Debug.Log ("m2=" + m2.dump ());

            executionResultText.text = "m1=" + m1.dump () + "\n";
            executionResultText.text += "m2=" + m2.dump () + "\n";

            Mat dst_mat = new Mat ();

            // GT (M1 > M2)
            Core.compare (m1, m2, dst_mat, Core.CMP_GT);
            Debug.Log ("GT (M1 > M2)=" + dst_mat.dump ());

            executionResultText.text += "GT (M1 > M2)=" + dst_mat.dump () + "\n";

            // GE (M1 >= M2)
            Core.compare (m1, m2, dst_mat, Core.CMP_GE);
            Debug.Log ("GE (M1 >= M2)=" + dst_mat.dump ());

            executionResultText.text += "GE (M1 >= M2)=" + dst_mat.dump () + "\n";

            // EQ (M1 == M2)
            Core.compare (m1, m2, dst_mat, Core.CMP_EQ);
            Debug.Log ("EQ (M1 == M2)=" + dst_mat.dump ());

            executionResultText.text += "EQ (M1 == M2)=" + dst_mat.dump () + "\n";

            // NE (M1 != M2)
            Core.compare (m1, m2, dst_mat, Core.CMP_NE);
            Debug.Log ("NE (M1 != M2)=" + dst_mat.dump ());

            executionResultText.text += "NE (M1 != M2)=" + dst_mat.dump () + "\n";

            // LE (M1 <= M2)
            Core.compare (m1, m2, dst_mat, Core.CMP_LE);
            Debug.Log ("LE (M1 <= M2)=" + dst_mat.dump ());

            executionResultText.text += "LE (M1 <= M2)=" + dst_mat.dump () + "\n";

            // LT (M1 < M2)
            Core.compare (m1, m2, dst_mat, Core.CMP_LT);
            Debug.Log ("LT (M1 < M2)=" + dst_mat.dump ());

            executionResultText.text += "LT (M1 < M2)=" + dst_mat.dump () + "\n";

            exampleCodeText.text = @"
            //
            // comparison example
            //

            // 3x3 matrix
            Mat m1 = new Mat (3, 3, CvType.CV_64FC1);
            m1.put (0, 0, 1,2,3,4,5,6,7,8,9);
            Mat m2 = new Mat (3, 3, CvType.CV_64FC1);
            m2.put (0, 0, 10,11,12,13,14,15,16,17,18);

            Debug.Log (""m1="" + m1.dump ());
            Debug.Log (""m2="" + m2.dump ());

            Mat dst_mat = new Mat ();

            // GT (M1 > M2)
            Core.compare (m1, m2, dst_mat, Core.CMP_GT);
            Debug.Log (""GT (M1 > M2)="" + dst_mat.dump ());

            // GE (M1 >= M2)
            Core.compare (m1, m2, dst_mat, Core.CMP_GE);
            Debug.Log (""GE (M1 >= M2)="" + dst_mat.dump ());

            // EQ (M1 == M2)
            Core.compare (m1, m2, dst_mat, Core.CMP_EQ);
            Debug.Log (""EQ (M1 == M2)="" + dst_mat.dump ());

            // NE (M1 != M2)
            Core.compare (m1, m2, dst_mat, Core.CMP_NE);
            Debug.Log (""NE (M1 != M2)="" + dst_mat.dump ());

            // LE (M1 <= M2)
            Core.compare (m1, m2, dst_mat, Core.CMP_LE);
            Debug.Log (""LE (M1 <= M2)="" + dst_mat.dump ());

            // LT (M1 < M2)
            Core.compare (m1, m2, dst_mat, Core.CMP_LT);
            Debug.Log (""LT (M1 < M2)="" + dst_mat.dump ());
            ";

            UpdateScrollRect ();
        }

        public void OnOperatorsExampleButtonClick ()
        {
            //
            // operators example
            //

            // 3x3 matrix
            Mat m1 = new Mat (3, 3, CvType.CV_64FC1);
            m1.put (0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
            Mat m2 = new Mat (3, 3, CvType.CV_64FC1);
            m2.put (0, 0, 10, 11, 12, 13, 14, 15, 16, 17, 18);
            Scalar s = new Scalar (5);
            double alpha = 3;

            Debug.Log ("m1=" + m1.dump ());
            Debug.Log ("m2=" + m2.dump ());
            Debug.Log ("s=" + s);
            Debug.Log ("alpha=" + alpha);

            executionResultText.text = "m1=" + m1.dump () + "\n";
            executionResultText.text += "m2=" + m2.dump () + "\n";
            executionResultText.text += "s=" + s + "\n";
            executionResultText.text += "alpha=" + alpha + "\n";

            // Addition, subtraction, negation: A+B, A-B, A+s, A-s, s+A, s-A, -A
            // (M1 + M2 = Core.add (M1, M2, M_dst))
            Debug.Log ("m1+m2=" + (m1 + m2).dump ());
            executionResultText.text += "m1+m2=" + (m1 + m2).dump () + "\n";
            // (M1 + s = Core.add (M1, s, M_dst))
            Debug.Log ("m1+s=" + (m1 + s).dump ());
            executionResultText.text += "m1+s=" + (m1 + s).dump () + "\n";

            // (M1 – M2 = Core.subtract (M1, M2, M_dst))
            Debug.Log ("m1-m2=" + (m1 - m2).dump ());
            executionResultText.text += "m1-m2=" + (m1 - m2).dump () + "\n";
            // (M1 – s = Core.subtract (M1, s, M_dst))
            Debug.Log ("m1-s=" + (m1 - s).dump ());
            executionResultText.text += "m1-s=" + (m1 - s).dump () + "\n";

            // (-M1 = Core.multiply (M1, Scalar.all (-1), M_dst))
            Debug.Log ("-m1=" + (-m1).dump ());
            executionResultText.text += "-m1=" + (-m1).dump () + "\n";


            // Scaling: A*alpha A/alpha
            // (M1 * 3 = Core.multiply (M1, Scalar.all (3), M_dst))
            Debug.Log ("m1*alpha=" + (m1 * alpha).dump ());
            executionResultText.text += "m1*alpha=" + (m1 * alpha).dump () + "\n";
            // (M1 / 3 = Core.divide (M1, Scalar.all (3), M_dst))
            Debug.Log ("m1/alpha=" + (m1 / alpha).dump ());
            executionResultText.text += "m1/alpha=" + (m1 / alpha).dump () + "\n";


            // Per-element multiplication and division: A.mul(B), A/B, alpha/A
            // (M1.mul(M2) = M1.mul (M2))
            Debug.Log ("m1.mul(m2)=" + (m1.mul (m2)).dump ());
            executionResultText.text += "m1.mul(m2)=" + (m1.mul (m2)).dump () + "\n";

            // (M1 / M2 = Core.divide (M1, M2, M_dst))
            Debug.Log ("m1/m2=" + (m1 / m2).dump ());
            executionResultText.text += "m1/m2=" + (m1 / m2).dump () + "\n";

            // (3 / M1 = Core.divide (new Mat (M1.size (), M1.type (), Scalar.all (3)), M1, M_dst))
            Debug.Log ("alpha/m2=" + (alpha / m2).dump ());
            executionResultText.text += "alpha/m2=" + (alpha / m2).dump () + "\n";


            // Matrix multiplication: A*B
            // (M1 * M2 = Core.gemm (M1, M2, 1, new Mat (), 0, M_dst))
            Debug.Log ("m1*m2=" + (m1 * m2).dump ());
            executionResultText.text += "m1*m2=" + (m1 * m2).dump () + "\n";


            // Bitwise logical operations: A logicop B, A logicop s, s logicop A, ~A, where logicop is one of :  &, |, ^.
            // (M1 & M2 = Core.bitwise_and (M1, M2, M_dst))
            Debug.Log ("m1&m2=" + (m1 & m2).dump ());
            executionResultText.text += "m1&m2=" + (m1 & m2).dump () + "\n";

            // (M1 | M2 = Core.bitwise_or (M1, M2, M_dst))
            Debug.Log ("m1|m2=" + (m1 | m2).dump ());
            executionResultText.text += "m1|m2=" + (m1 | m2).dump () + "\n";

            // (M1 ^ M2 = Core.bitwise_xor (M1, M2, M_dst))
            Debug.Log ("m1^m2=" + (m1 ^ m2).dump ());
            executionResultText.text += "m1^m2=" + (m1 ^ m2).dump () + "\n";

            // (~M1 = Core.bitwise_not (M1, M_dst))
            Debug.Log ("~m1=" + (~m1).dump ());
            executionResultText.text += "~m1=" + (~m1).dump () + "\n";

            // Note.
            // The assignment operator behavior is different from OpenCV (c ++). 
            // For example, C = A + B will not be expanded to cv :: add (A, B, C).
            // Also cannot assign a scalar to Mat like C = s.


            exampleCodeText.text = @"
            //
            // operators example
            //

            // 3x3 matrix
            Mat m1 = new Mat (3, 3, CvType.CV_64FC1);
            m1.put (0, 0, 1,2,3,4,5,6,7,8,9);
            Mat m2 = new Mat (3, 3, CvType.CV_64FC1);
            m2.put (0, 0, 10,11,12,13,14,15,16,17,18);
            Scalar s = new Scalar (5);
            double alpha = 3;

            Debug.Log (""m1="" + m1.dump ());
            Debug.Log (""m2="" + m2.dump ());
            Debug.Log (""s="" + s);
            Debug.Log (""alpha="" + alpha);

            // Addition, subtraction, negation: A+B, A-B, A+s, A-s, s+A, s-A, -A
            // (M1 + M2 = Core.add (M1, M2, M_dst))
            Debug.Log (""m1+m2="" + (m1 + m2).dump());
            // (M1 + s = Core.add (M1, s, M_dst))
            Debug.Log (""m1+s="" + (m1 + s).dump());

            // (M1 – M2 = Core.subtract (M1, M2, M_dst))
            Debug.Log (""m1-m2="" + (m1 - m2).dump());
            // (M1 – s = Core.subtract (M1, s, M_dst))
            Debug.Log (""m1-s="" + (m1 - s).dump());

            // (-M1 = Core.multiply (M1, Scalar.all (-1), M_dst))
            Debug.Log (""-m1="" + (-m1).dump());


            // Scaling: A*alpha A/alpha
            // (M1 * 3 = Core.multiply (M1, Scalar.all (3), M_dst))
            Debug.Log (""m1*alpha="" + (m1*alpha).dump());
            // (M1 / 3 = Core.divide (M1, Scalar.all (3), M_dst))
            Debug.Log (""m1/alpha="" + (m1/alpha).dump());


            // Per-element multiplication and division: A.mul(B), A/B, alpha/A
            // (M1.mul(M2) = M1.mul (M2))
            Debug.Log (""m1.mul(m2)="" + (m1.mul(m2)).dump());

            // (M1 / M2 = Core.divide (M1, M2, M_dst))
            Debug.Log (""m1/m2="" + (m1 / m2).dump());

            // (3 / M1 = Core.divide (new Mat (M1.size (), M1.type (), Scalar.all (3)), M1, M_dst))
            Debug.Log (""alpha/m2="" + (alpha / m2).dump());


            // Matrix multiplication: A*B
            // (M1 * M2 = Core.gemm (M1, M2, 1, new Mat (), 0, M_dst))
            Debug.Log (""m1*m2="" + (m1 * m2).dump());


            // Bitwise logical operations: A logicop B, A logicop s, s logicop A, ~A, where logicop is one of :  &, |, ^.
            // (M1 & M2 = Core.bitwise_and (M1, M2, M_dst))
            Debug.Log (""m1&m2="" + (m1 & m2).dump());

            // (M1 | M2 = Core.bitwise_or (M1, M2, M_dst))
            Debug.Log (""m1|m2="" + (m1 | m2).dump());

            // (M1 ^ M2 = Core.bitwise_xor (M1, M2, M_dst))
            Debug.Log (""m1^m2="" + (m1 ^ m2).dump());

            // (~M1 = Core.bitwise_not (M1, M_dst))
            Debug.Log (""~m1="" + (~m1).dump());


            // Note.
            // The assignment operator behavior is different from OpenCV (c ++). 
            // For example, C = A + B will not be expanded to cv :: add (A, B, C).
            // Also cannot assign a scalar to Mat like C = s.
            ";

            UpdateScrollRect ();
        }

        public void OnGetAndPutExampleButtonClick ()
        {
            //
            // get and put example
            //

            // channels=4 3x3 matrix
            Mat m1 = new Mat (3, 3, CvType.CV_8UC4, new Scalar (1, 2, 3, 4));
            Debug.Log ("m1=" + m1.dump ());

            executionResultText.text = "m1=" + m1.dump () + "\n";


            // get an element value.
            double[] m1_1_1 = m1.get (1, 1);
            Debug.Log ("m1[1,1]=" + m1_1_1 [0] + ", " + m1_1_1 [1] + ", " + m1_1_1 [2] + ", " + m1_1_1 [3]);

            executionResultText.text += "m1[1,1]=" + m1_1_1 [0] + ", " + m1_1_1 [1] + ", " + m1_1_1 [2] + ", " + m1_1_1 [3] + "\n";

            // get an array of all element values.
            byte[] m1_array = new byte[m1.total () * m1.channels ()];
            m1.get (0, 0, m1_array);

            string dump_str = "";
            foreach (var i in m1_array) {
                dump_str += i + ", ";
            }
            Debug.Log ("m1_array=" + dump_str);

            executionResultText.text += "m1_array=" + dump_str + "\n";

            // another faster way. (use Utils.copyFromMat())
            Utils.copyFromMat (m1, m1_array);

            dump_str = "";
            foreach (var i in m1_array) {
                dump_str += i + ", ";
            }
            Debug.Log ("m1_array (use Utils.copyFromMat())=" + dump_str);

            executionResultText.text += "m1_array (use Utils.copyFromMat())=" + dump_str + "\n";


            // put an element value in a matrix.
            Mat m2 = m1.clone ();
            m2.put (1, 1, 5, 6, 7, 8);
            Debug.Log ("m2=" + m2.dump ());

            executionResultText.text += "m2=" + m2.dump () + "\n";

            // put an array of element values in a matrix.
            byte[] m2_arr = new byte[] {
                5,
                6,
                7,
                8,
                5,
                6,
                7,
                8,
                5,
                6,
                7,
                8,
                5,
                6,
                7,
                8,
                5,
                6,
                7,
                8,
                5,
                6,
                7,
                8,
                5,
                6,
                7,
                8,
                5,
                6,
                7,
                8,
                5,
                6,
                7,
                8
            };
            m2.put (0, 0, m2_arr);
            Debug.Log ("m2=" + m2.dump ());

            executionResultText.text += "m2=" + m2.dump () + "\n";

            // another faster way. (use Utils.copyToMat())
            Utils.copyToMat (m2_arr, m2);
            Debug.Log ("m2 (use Utils.copyToMat())=" + m2.dump ());

            executionResultText.text += "m2 (use Utils.copyToMat())=" + m2.dump () + "\n";


            // fill element values (setTo method)
            m2.setTo (new Scalar (100, 100, 100, 100));
            Debug.Log ("m2=" + m2.dump ());

            executionResultText.text += "m2=" + m2.dump () + "\n";

            exampleCodeText.text = @"
            //
            // get and put example
            //

            // channels=4 3x3 matrix
            Mat m1 = new Mat (3, 3, CvType.CV_8UC4 , new Scalar(1,2,3,4));
            Debug.Log (""m1="" + m1.dump ());

            // get an element value.
            double[] m1_1_1 = m1.get(1,1);
            Debug.Log (""m1[1,1]="" + m1_1_1[0] + "", "" + m1_1_1[1] + "", "" + m1_1_1[2] + "", "" + m1_1_1[3]);

            // get an array of all element values.
            byte[] m1_array = new byte[m1.total () * m1.channels()];
            m1.get (0, 0, m1_array);

            string dump_str = """";
            foreach (var i in m1_array){
                dump_str += i + "", "";
            }
            Debug.Log (""m1_array="" + dump_str);

            // another faster way. (use Utils.copyFromMat())
            Utils.copyFromMat (m1, m1_array);

            dump_str = """";
            foreach (var i in m1_array) {
                dump_str += i + "", "";
            }
            Debug.Log (""m1_array (use Utils.copyFromMat())="" + dump_str);


            // put an element value in a matrix.
            Mat m2 = m1.clone ();
            m2.put (1, 1, 5,6,7,8);
            Debug.Log (""m2="" + m2.dump ());

            // put an array of element values in a matrix.
            byte[] m2_arr = new byte[]{5,6,7,8,5,6,7,8,5,6,7,8,5,6,7,8,5,6,7,8,5,6,7,8,5,6,7,8,5,6,7,8,5,6,7,8};
            m2.put (0, 0, m2_arr);
            Debug.Log (""m2="" + m2.dump ());

            // another faster way. (use Utils.copyToMat())
            Utils.copyToMat (m2_arr, m2);
            Debug.Log (""m2 (use Utils.copyToMat())="" + m2.dump ());


            // fill element values (setTo method)
            m2.setTo(new Scalar(100,100,100,100));
            Debug.Log (""m2="" + m2.dump ());
            ";

            UpdateScrollRect ();
        }

        public void OnAccessingPixelValueExampleButtonClick ()
        {
            //
            // accessing pixel value example
            //

            // How access pixel value in an OpenCV Mat.

            // channels=4 10x10 matrix (RGBA color image)
            Mat src_img = new Mat (10, 10, CvType.CV_8UC4, new Scalar (0, 0, 0, 255));
            Mat dst_img = new Mat (10, 10, CvType.CV_8UC4);

            Debug.Log ("src_img=" + src_img.dump ());
            executionResultText.text = "src_img=" + src_img.dump () + "\n";

            // Copies an OpenCV Mat data to a pixel data Array.
            byte[] img_array = new byte[src_img.total () * src_img.channels ()];
            Utils.copyFromMat (src_img, img_array);

            int pixel_i = 0;
            int channels = src_img.channels ();
            int total = (int)src_img.total ();
            for (int i = 0; i < total; i++) {

                img_array [pixel_i] = (byte)i;
                img_array [pixel_i + 1] = (byte)i;
                img_array [pixel_i + 2] = (byte)i;

                // Advance to next pixel
                pixel_i += channels;
            }

            // Copies a pixel data Array to an OpenCV Mat data.
            Utils.copyToMat (img_array, dst_img);

            Debug.Log ("dst_img=" + dst_img.dump ());
            executionResultText.text += "dst_img=" + dst_img.dump () + "\n";

            exampleCodeText.text = @"
            //
            // accessing pixel value example
            //

            // How access pixel value in an OpenCV Mat.

            // channels=4 10x10 matrix (RGBA color image)
            Mat src_img = new Mat (10, 10, CvType.CV_8UC4, new Scalar (0, 0, 0, 255));
            Mat dst_img = new Mat (10, 10, CvType.CV_8UC4);

            Debug.Log (""src_img="" + src_img.dump ());

            // Copies an OpenCV Mat data to a pixel data Array.
            byte[] img_array = new byte[src_img.total () * src_img.channels()];
            Utils.copyFromMat (src_img, img_array);

            int pixel_i = 0;
            int channels = src_img.channels();
            int total = (int)src_img.total();
            for (int i = 0; i < total; i++) {

                img_array [pixel_i] = (byte)i;
                img_array [pixel_i + 1] = (byte)i;
                img_array [pixel_i + 2] = (byte)i;

                // Advance to next pixel
                pixel_i += channels;
            }

            // Copies a pixel data Array to an OpenCV Mat data.
            Utils.copyToMat (img_array, dst_img);

            Debug.Log (""dst_img="" + dst_img.dump ());
            ";

            UpdateScrollRect ();
        }
    }
}