OTS/OTSIncAMeasureApp/ServiceCenter/CImageHandler.cs

using OTSDataType;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using static OTSDataType.otsdataconst;

namespace OTSModelSharp.ServiceCenter
{
    using OpenCvSharp;
    using OTSCLRINTERFACE;
    using System.Drawing.Imaging;
    using System.Runtime.InteropServices;

    public class CImageHandler
    {
        private ImageProForClr imgProEngine;
        public CImageHandler()
        {
            COTSImgProcPrmClr imageprocessParam = new COTSImgProcPrmClr();
            imgProEngine = new ImageProForClr(imageprocessParam);

        }
        #region 通过byte数组生成BMP图像文件
        /// <summary>    
        /// 将一个byte的数组转换为8bit灰度位图
        /// </summary>    
        /// <param name="data">数组</param>    
        /// <param name="width">图像宽度</param>    
        /// <param name="height">图像高度</param>    
        /// <returns>位图</returns>    
        public static Bitmap ToGrayBitmap(byte[] data, int width, int height)
        {
            if (width == 0 || height == 0)
                return null;
            //// 申请目标位图的变量，并将其内存区域锁定    
            Bitmap bmp = new Bitmap(width, height, PixelFormat.Format8bppIndexed);

            //// BitmapData这部分内容  需要 using System.Drawing.Imaging;  
            BitmapData bmpData = bmp.LockBits(new Rectangle(0, 0, width, height),
            ImageLockMode.WriteOnly, PixelFormat.Format8bppIndexed);

            //// 获取图像参数    
            // 扫描线的宽度   
            int stride = bmpData.Stride;
            // 显示宽度与扫描线宽度的间隙  
            int offset = stride - width;
            // 获取bmpData的内存起始位置
            IntPtr iptr = bmpData.Scan0;
            // 用stride宽度，表示这是内存区域的大小
            int scanBytes = stride * height;

            //// 下面把原始的显示大小字节数组转换为内存中实际存放的字节数组    
            int posScan = 0;
            int posReal = 0;// 分别设置两个位置指针，指向源数组和目标数组    
            byte[] pixelValues = new byte[scanBytes];  //为目标数组分配内存    

            //for (int x = height-1;x>=0 ; x--) data[startIndex+ y];//
            for (int x = 0; x < height; x++)
            {
                int startIndex = x * width;
                //// 下面的循环节是模拟行扫描    
                for (int y = 0; y < width; y++)
                {
                    pixelValues[posScan++] = data[posReal++];
                }
                posScan += offset;  //行扫描结束，要将目标位置指针移过那段“间隙”    
            }
            //// 用Marshal的Copy方法，将刚才得到的内存字节数组复制到BitmapData中    
            System.Runtime.InteropServices.Marshal.Copy(pixelValues, 0, iptr, scanBytes);
            bmp.UnlockBits(bmpData);  // 解锁内存区域    

            //// 下面的代码是为了修改生成位图的索引表，从伪彩修改为灰度    
            ColorPalette tempPalette;
            using (Bitmap tempBmp = new Bitmap(1, 1, PixelFormat.Format8bppIndexed))
            {
                tempPalette = tempBmp.Palette;
            }
            for (int i = 0; i < 256; i++)
            {
                tempPalette.Entries[i] = Color.FromArgb(i, i, i);
            }
            bmp.Palette = tempPalette;


            return bmp;
        }
        #endregion

        public static byte[] BitmapToGrayByte(Bitmap bitmap)
        {
            // 申请目标位图的变量，并将其内存区域锁定
            BitmapData bitmapDat = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadWrite, bitmap.PixelFormat);
            // 获取bmpData的内存起始位置
            IntPtr intPtr = bitmapDat.Scan0;
            byte[] image = new byte[bitmap.Width * bitmap.Height];//原始数据
            Marshal.Copy(intPtr, image, 0, bitmap.Width * bitmap.Height); // 将数据复制到byte数组中，
            //解锁内存区域  
            bitmap.UnlockBits(bitmapDat);
            return image;
        }

        //获取测量的BSE图

        public bool GetBSEImage(COTSField tempFld, COTSImageProcParam ImgProcPrm, double pixelSize, int iWidth, int iHeight, ref byte[] BSEImageNoBG)
        {
            Rectangle rect = new Rectangle();
            rect.Height = iHeight;
            rect.Width = iWidth;

            CBSEImgClr pBSEImageOut = new CBSEImgClr(rect);



            if (null == ImgProcPrm)
            {
                return false;
            }


            RemoveBackGround(tempFld, ImgProcPrm, pixelSize, ref pBSEImageOut);


            BSEImageNoBG = pBSEImageOut.GetImageDataPtr();

            return true;
        }


        /// <summary>
        /// 获取测量的BSE图
        /// </summary>
        /// <param name="BSEImage">BSE原数据</param>
        /// <param name="iHeight">图像高度</param>
        /// <param name="iWidth">图像宽度</param>
        /// <param name="grayStart"></param>
        /// <param name="grayEnd"></param>
        /// <param name="BSEImageNoBG">去背景图数据</param>
        /// <returns></returns>
        public bool GetSpecificGreyRangeBSEImage(byte[] BSEImage, int iWidth, int iHeight, int grayStart, int grayEnd, ref byte[] BSEImageNoBG)
        {
            Rectangle rect = new Rectangle();
            rect.Height = iHeight;
            rect.Width = iWidth;
            CBSEImgClr pBSEImageIn = new CBSEImgClr(rect);
            CBSEImgClr pBSEImageOut = new CBSEImgClr(rect);



            pBSEImageIn.SetImageData(BSEImage, iWidth, iHeight);




            CIntRangeClr cIntRangeClr = new CIntRangeClr();
            cIntRangeClr.SetStart(grayStart);
            cIntRangeClr.SetEnd(grayEnd);

            //ImageProForClr imgpro = new ImageProForClr();
            int num = 0;
            imgProEngine.GetSpecialGrayRangeImage(pBSEImageIn, cIntRangeClr, pBSEImageOut, ref num);

            for (int i = 0; i < iWidth; i++)
            {
                for (int j = 0; j < iHeight; j++)
                {
                    var bse = pBSEImageOut.GetBSEValue(i, j);
                    if (bse == 255)
                    {
                        var originalBse = pBSEImageIn.GetBSEValue(i, j);
                        pBSEImageOut.SetBSEValue(i, j, originalBse);
                    }
                    else
                    {
                        pBSEImageOut.SetBSEValue(i, j, 255);
                    }


                }

            }
            BSEImageNoBG = pBSEImageOut.GetImageDataPtr();

            return true;
        }





        public bool GetColoredImage(COTSField tempFld, COTSImageProcParam ImgProcPrm, double pixelSize, int iWidth, int iHeight, ref CBSEImgClr a_pImgOut, ref Bitmap BSEImageNoBG)
        {


            if (null == ImgProcPrm)
            {
                return false;
            }

            RemoveBGAndGetColoredParts(tempFld, ImgProcPrm, pixelSize, ref a_pImgOut, ref BSEImageNoBG);//RemoveBGAndGetColoredParts


            return true;
        }
        // remove background
        private void RemoveBackGround(COTSField tempFld, COTSImageProcParam a_pImgProcessParam, double a_pixelSize, ref CBSEImgClr a_pImgOut)
        {


            List<COTSParticleClr> parts = new List<COTSParticleClr>();
            List<COTSParticleClr> specialGreyparts = new List<COTSParticleClr>();
            var ecdrange = a_pImgProcessParam.GetIncAreaRange();
            var originalBse = tempFld.GetBSEImage();

            if (!RemoveBGAndGetParts(tempFld, a_pImgProcessParam, ref parts))
            {
                return;
            }
            tempFld.SetListAnalysisParticles(parts);
            tempFld.CalParticleImageProp(parts);
            tempFld.SelectParticlesAccordingImgProp(a_pImgProcessParam);
            //parts = tempFld.GetListAnalysisParticles();
            if (a_pImgProcessParam.GetSpecialGreyRangeParam().GetIsToRun())
            {
                var param = a_pImgProcessParam.GetSpecialGreyRangeParam();
                var ranges = param.GetSpecialGreyRanges();


                foreach (var r in ranges)
                {
                    CIntRangeClr r1 = new CIntRangeClr();
                    r1.SetStart(r.range.GetStart());
                    r1.SetEnd(r.range.GetEnd());

                    CDoubleRangeClr r2 = new CDoubleRangeClr();
                    r2.SetStart(r.diameterRange.GetStart());
                    r2.SetEnd(r.diameterRange.GetEnd());

                    GetParticlesBySpecialGray(originalBse, r1, r2, a_pixelSize, ref specialGreyparts);
                }

            }


            for (int i = 0; i < a_pImgOut.GetWidth(); i++)
            {
                for (int j = 0; j < a_pImgOut.GetHeight(); j++)
                {
                    a_pImgOut.SetBSEValue(i, j, 255);
                }
            }
            if (specialGreyparts.Count > 0)
            {
                foreach (var p in specialGreyparts)
                {
                    foreach (var s in p.GetFeature().GetSegmentsList())
                    {
                        for (int i = s.GetStart(); i < s.GetStart() + s.GetLength(); i++)
                        {
                            var bseValue = originalBse.GetBSEValue(i, s.GetHeight());
                            a_pImgOut.SetBSEValue(i, s.GetHeight(), bseValue);
                        }
                    }

                }

            }


            foreach (var p in parts)
            {

                foreach (var s in p.GetFeature().GetSegmentsList())
                {

                    for (int i = s.GetStart(); i < s.GetStart() + s.GetLength(); i++)
                    {
                        var bseValue = originalBse.GetBSEValue(i, s.GetHeight());
                        a_pImgOut.SetBSEValue(i, s.GetHeight(), bseValue);
                    }
                }


            }



            return;
        }
        private void RemoveBGAndGetColoredParts(COTSField tempFld, COTSImageProcParam a_pImgProcessParam, double a_pixelSize, ref CBSEImgClr a_pImgOut, ref Bitmap a_pBmpOut)
        {


            List<COTSParticleClr> parts = new List<COTSParticleClr>();
            List<COTSParticleClr> specialGreyparts = new List<COTSParticleClr>();
            var ecdrange = a_pImgProcessParam.GetIncAreaRange();

            if (!RemoveBGAndGetParts(tempFld, a_pImgProcessParam, ref parts))
            {
                return;
            }
            if (a_pImgProcessParam.GetBGRemoveType() == OTS_BGREMOVE_TYPE.WaterShed)
            {
                List<COTSParticleClr> allsubRegions = new List<COTSParticleClr>();


                foreach (var p in parts)
                {
                    if (p.GetSubParticles().Count > 0)
                    {
                        var subparts = p.GetSubParticles();
                        allsubRegions.AddRange(subparts);
                    }
                    else
                    {
                        allsubRegions.Add(p);
                    }
                }

                tempFld.SetListAnalysisParticles(allsubRegions);
            }
            else 
            {
                tempFld.SetListAnalysisParticles(parts);
            }


            tempFld.CalParticleImageProp(parts);
           
            tempFld.SelectParticlesAccordingImgProp(a_pImgProcessParam);
            var Analysisparts = tempFld.GetListAnalysisParticles();
            var a_pImgIn = tempFld.GetBSEImage();
            Random c = new Random();



            for (int i = 0; i < a_pBmpOut.Width; i++)
            {
                for (int j = 0; j < a_pBmpOut.Height; j++)
                {
                    a_pBmpOut.SetPixel(i, j, Color.White);
                }

            }



            foreach (var p in Analysisparts)
            {

                Color cValue = GetRandomColor30(c);

                //Color cValue = p.GetTypeColor();
                foreach (var s in p.GetFeature().GetSegmentsList())
                {

                    for (int i = s.GetStart(); i < s.GetStart() + s.GetLength(); i++)
                    {
                        var y = s.GetHeight();
                        a_pBmpOut.SetPixel(i, y, cValue);
                    }
                }

            }

            if (a_pImgProcessParam.GetSpecialGreyRangeParam().GetIsToRun())
            {
                var param = a_pImgProcessParam.GetSpecialGreyRangeParam();
                var ranges = param.GetSpecialGreyRanges();


                foreach (var r in ranges)
                {
                    CIntRangeClr r1 = new CIntRangeClr();
                    r1.SetStart(r.range.GetStart());
                    r1.SetEnd(r.range.GetEnd());

                    CDoubleRangeClr r2 = new CDoubleRangeClr();
                    r2.SetStart(r.diameterRange.GetStart());
                    r2.SetEnd(r.diameterRange.GetEnd());

                    GetParticlesBySpecialGray(tempFld.GetBSEImage(), r1, r2, a_pixelSize, ref specialGreyparts);
                }


                if (specialGreyparts.Count > 0)
                {
                    foreach (var p in specialGreyparts)
                    {
                        Color cValue = GetRandomColor30(c);
                        foreach (var s in p.GetFeature().GetSegmentsList())
                        {
                            for (int i = s.GetStart(); i < s.GetStart() + s.GetLength(); i++)
                            {
                                var bseValue = a_pImgIn.GetBSEValue(i, s.GetHeight());
                                a_pBmpOut.SetPixel(i, s.GetHeight(), cValue);
                            }
                        }

                    }
                    tempFld.CalParticleImageProp(specialGreyparts);
                    Analysisparts.AddRange(specialGreyparts);
                    tempFld.SetListAnalysisParticles(Analysisparts);
                    //tempFld.SelectParticlesAccordingImgProp(a_pImgProcessParam);    


                }


            }


            Graphics graphics = Graphics.FromImage(a_pBmpOut);

            // 绘制一个红色矩形
            Pen pen = new Pen(Color.Red, 1);
            var overlap = a_pImgProcessParam.GetOverlapParam();
            if (overlap > 0)
            {
                int overlapPixels = (int)(overlap / a_pixelSize);
                graphics.DrawRectangle(pen, overlapPixels, overlapPixels, a_pBmpOut.Width - 2 * overlapPixels, a_pBmpOut.Height - 2 * overlapPixels);

            }



            return;
        }
        public void GetImageWithBlackColoredParts(List<COTSParticleClr> analysitParts, COTSImageProcParam a_pImgProcessParam, double a_pixelSize, ref Bitmap a_pBmpOut)
        {





            for (int i = 0; i < a_pBmpOut.Width; i++)
            {
                for (int j = 0; j < a_pBmpOut.Height; j++)
                {
                    a_pBmpOut.SetPixel(i, j, Color.White);
                }

            }
            Random c = new Random();



            foreach (var p in analysitParts)
            {

                Color cValue = GetRandomColor30(c);
                foreach (var s in p.GetFeature().GetSegmentsList())
                {

                    for (int i = s.GetStart(); i < s.GetStart() + s.GetLength(); i++)
                    {

                        a_pBmpOut.SetPixel(i, s.GetHeight(), cValue);
                    }
                }

            }
            Graphics graphics = Graphics.FromImage(a_pBmpOut);

            // 绘制一个红色矩形
            Pen pen = new Pen(Color.Red, 1);
            var overlap = a_pImgProcessParam.GetOverlapParam();
            if (overlap > 0)
            {
                int overlapPixels = (int)(overlap / a_pixelSize);
                graphics.DrawRectangle(pen, overlapPixels, overlapPixels, a_pBmpOut.Width - 2 * overlapPixels, a_pBmpOut.Height - 2 * overlapPixels);

            }

            return;
        }
        public void GetImageWithSTDColoredParts(List<COTSParticleClr> analysitParts, COTSImageProcParam a_pImgProcessParam, double a_pixelSize, ref Bitmap a_pBmpOut)
        {





            for (int i = 0; i < a_pBmpOut.Width; i++)
            {
                for (int j = 0; j < a_pBmpOut.Height; j++)
                {
                    a_pBmpOut.SetPixel(i, j, Color.White);
                }

            }
            //Random c = new Random();



            foreach (var p in analysitParts)
            {

                Color cValue = ColorTranslator.FromHtml(p.GetTypeColor());
                foreach (var s in p.GetFeature().GetSegmentsList())
                {

                    for (int i = s.GetStart(); i < s.GetStart() + s.GetLength(); i++)
                    {

                        a_pBmpOut.SetPixel(i, s.GetHeight(), cValue);
                    }
                }

            }

            Graphics graphics = Graphics.FromImage(a_pBmpOut);

            // 绘制一个红色矩形
            Pen pen = new Pen(Color.Red, 1);
            var overlap = a_pImgProcessParam.GetOverlapParam();
            if (overlap > 0)
            {
                int overlapPixels = (int)(overlap / a_pixelSize);
                graphics.DrawRectangle(pen, overlapPixels, overlapPixels, a_pBmpOut.Width - 2 * overlapPixels, a_pBmpOut.Height - 2 * overlapPixels);

            }
            return;
        }

        public Color GetRandomColor30(Random r)
        {

            int n = r.Next(0, 31);

            Color ret_color;
            switch (n)
            {
                case 1:
                    ret_color = Color.Aqua;
                    break;
                case 2:
                    ret_color = Color.Black;
                    break;
                case 3:
                    ret_color = Color.Blue;
                    break;
                case 4:
                    ret_color = Color.BlueViolet;
                    break;
                case 5:
                    ret_color = Color.Brown;
                    break;
                case 6:
                    ret_color = Color.BurlyWood;
                    break;
                case 7:
                    ret_color = Color.CadetBlue;
                    break;
                case 8:
                    ret_color = Color.CadetBlue;
                    break;
                case 9:
                    ret_color = Color.CornflowerBlue;
                    break;
                case 10:
                    ret_color = Color.DarkBlue;
                    break;
                case 11:
                    ret_color = Color.Gray;
                    break;
                case 12:
                    ret_color = Color.Indigo;
                    break;
                case 13:
                    ret_color = Color.LightSlateGray;
                    break;
                case 14:
                    ret_color = Color.Magenta;
                    break;
                case 15:
                    ret_color = Color.Maroon;
                    break;
                case 16:
                    ret_color = Color.MediumBlue;
                    break;
                case 17:
                    ret_color = Color.MediumOrchid;
                    break;
                case 18:
                    ret_color = Color.MidnightBlue;
                    break;
                case 19:
                    ret_color = Color.Navy;
                    break;
                case 20:
                    ret_color = Color.Olive;
                    break;
                case 21:
                    ret_color = Color.PaleVioletRed;
                    break;
                case 22:
                    ret_color = Color.Peru;
                    break;
                case 23:
                    ret_color = Color.Purple;
                    break;
                case 24:
                    ret_color = Color.Red;
                    break;
                case 25:
                    ret_color = Color.RosyBrown;
                    break;
                case 26:
                    ret_color = Color.RoyalBlue;
                    break;
                case 27:
                    ret_color = Color.SaddleBrown;
                    break;
                case 28:
                    ret_color = Color.SeaGreen;
                    break;
                case 29:
                    ret_color = Color.Teal;
                    break;
                case 30:
                    ret_color = Color.Tomato;
                    break;
                case 31:
                    ret_color = Color.YellowGreen;
                    break;

                default:
                    ret_color = Color.Black;
                    break;
            }

            return ret_color;
        }


        public bool CalParticleImageProp(COTSParticleClr part, double a_pixelSize)
        {

            imgProEngine.CalcuParticleImagePropertes(part, a_pixelSize);

            return true;
        }



        public bool RemoveBGAndGetParts(COTSField currentField, COTSImageProcParam a_pImgProcessParam, ref List<COTSParticleClr> parts)
        {
            var a_pixelSize = currentField.GetPixelSize();
            COTSImgProcPrmClr prm = GetImageProcPrmClr(a_pImgProcessParam);
            COTSFieldDataClr flddataclr = new COTSFieldDataClr();
            PointF fldpos = currentField.GetOTSPosition();
            flddataclr.SetPosition((int)fldpos.X, (int)fldpos.Y);
            flddataclr.SetImageWidth(currentField.ImgWidth);
            flddataclr.SetImageHeight(currentField.ImgHeight);
            double left = fldpos.X - currentField.ImgWidth * a_pixelSize / 2;
            double top = fldpos.Y + currentField.ImgHeight * a_pixelSize / 2;
            double right = fldpos.X + currentField.ImgWidth * a_pixelSize / 2;
            double bottom = fldpos.Y - currentField.ImgHeight * a_pixelSize / 2;
            flddataclr.SetOTSRect(left, top, right, bottom);

            if (!imgProEngine.GetFieldDataFromImage(currentField.GetBSEImage(), prm, a_pixelSize, flddataclr))
            {
                return false;
            }
            List<COTSParticleClr> originalParts = flddataclr.GetParticleList();
            parts = originalParts;






            return true;

        }
        public bool GetParticlesBySpecialGray(CBSEImgClr img, CIntRangeClr grayrange, CDoubleRangeClr diameterRange, double a_pixelSize, ref List<COTSParticleClr> parts)
        {


            COTSFieldDataClr flddataclr = new COTSFieldDataClr();
            imgProEngine.GetParticlesBySpecialPartGrayRange(img, grayrange, diameterRange, a_pixelSize, flddataclr);

            parts = flddataclr.GetParticleList();
            return true;

        }
        private COTSImgProcPrmClr GetImageProcPrmClr(COTSImageProcParam a_oSource)
        {

            COTSImgProcPrmClr prmclr = new COTSImgProcPrmClr();
            CDoubleRangeClr r1 = new CDoubleRangeClr(a_oSource.GetIncAreaRange().GetStart(), a_oSource.GetIncAreaRange().GetEnd());
            prmclr.SetIncArea(r1);
            CIntRangeClr r2 = new CIntRangeClr(a_oSource.GetBGGray().GetStart(), a_oSource.GetBGGray().GetEnd());
            prmclr.SetBGGray(r2);
            CIntRangeClr r3 = new CIntRangeClr(a_oSource.GetParticleGray().GetStart(), a_oSource.GetParticleGray().GetEnd());
            prmclr.SetParticleGray(r3);
            prmclr.SetBGRemoveType((int)a_oSource.GetBGRemoveType());
            prmclr.SetAutoBGRemoveType((int)a_oSource.GetAutoBGRemoveType());

            prmclr.SetOverlapParam(a_oSource.GetOverlapParam());
            prmclr.SetMatrixStep(a_oSource.MatrixStep);


            return prmclr;
        }
        public bool CalculateBrightnessDarkGrayByOtsu(CBSEImgClr bseimg, ref int bright, ref int dark)
        {
            if (bseimg == null || bseimg.GetImageDataPtr() == null)
            {
                bright = 0;
                dark = 0;
                return false;
            }


            return imgProEngine.CalcuBrightPhaseDarkPhaseGrayByOtsu(bseimg, ref bright, ref dark);
        }

        public bool MergeBigBoundaryParticles(List<COTSField> allFields, double pixelSize, int scanFieldSize, System.Drawing.Size ResolutionSize, ref List<COTSParticleClr> mergedParts)
        {
            List<COTSFieldDataClr> fldclrs = new List<COTSFieldDataClr>();
            foreach (var f in allFields)
            {
                COTSFieldDataClr fldclr = new COTSFieldDataClr();
                PointF p1 = f.GetOTSPosition();
                System.Drawing.Point p2 = new System.Drawing.Point((int)p1.X, (int)p1.Y);
                fldclr.SetPosition((int)p1.X, (int)p1.Y);
                fldclr.SetImageWidth(f.ImgWidth);
                fldclr.SetImageHeight(f.ImgHeight);
                var parts = f.GetListAnalysisParticles();
                foreach (var p in parts)
                {
                    fldclr.AddParticle(p);
                }
                fldclrs.Add(fldclr);
            }


            imgProEngine.MergeBigBoundaryParticles(fldclrs, pixelSize, scanFieldSize, ResolutionSize, mergedParts);
            return true;

        }

        /// <summary>
        /// 根据Segment寻找边缘坐标点
        /// </summary>
        /// <param name="width"></param>
        /// <param name="height"></param>
        /// <param name="segmentClrs"></param>
        /// <returns></returns>
        public static List<System.Drawing.Point> FindContoursBySegment(int width, int height, List<COTSSegmentClr> segmentClrs)
        {
            List<System.Drawing.Point> points = new List<System.Drawing.Point>();
            using (Mat mat = new Mat(height, width, MatType.CV_8UC1, new Scalar(0)))
            {
                for (int i = 0; i < segmentClrs.Count; i++)
                {
                    Cv2.Line(mat, new OpenCvSharp.Point(segmentClrs[i].GetStart(), segmentClrs[i].GetHeight()), new OpenCvSharp.Point(segmentClrs[i].GetStart() + segmentClrs[i].GetLength(), segmentClrs[i].GetHeight()), Scalar.White, 1, LineTypes.AntiAlias);
                }
                OpenCvSharp.Point[][] contours;
                HierarchyIndex[] hierarchy;
                Cv2.FindContours(mat, out contours, out hierarchy, RetrievalModes.External, ContourApproximationModes.ApproxSimple, null);
                for (int i = 0; i < contours.ToList().Count(); i++)
                {
                    for (int j = 0; j < contours[i].Count(); j++)
                    {
                        System.Drawing.Point point = new System.Drawing.Point(contours[i][j].X, contours[i][j].Y);
                        if (!points.Contains(point))
                        {
                            points.Add(point);
                        }
                    }
                }
            }
            return points;
        }


    }
}