C# CvPoint类代码示例

        /// <summary>
        /// 
        /// </summary>
        public SeqPartition()
        {
            CvMemStorage storage = new CvMemStorage(0);
            pointSeq = new CvSeq<CvPoint>(SeqType.EltypeS32C2, CvSeq.SizeOf, storage);
            Random rand = new Random();
            canvas = new IplImage(Width, Height, BitDepth.U8, 3);

            colors = new CvScalar[Count];
            for (int i = 0; i < Count; i++)
            {
                CvPoint pt = new CvPoint
                {
                    X = rand.Next(Width),
                    Y = rand.Next(Height)
                };
                pointSeq.Push(pt);
                int icolor = rand.Next() | 0x00404040;
                colors[i] = Cv.RGB(icolor & 255, (icolor >> 8) & 255, (icolor >> 16) & 255);
            }

            using (window = new CvWindowEx() { Text = "points" })
            {
                window.CreateTrackbar("threshold", 10, 50, OnTrack);
                OnTrack(10);
                CvWindowEx.WaitKey();
            }
        }

        public 描画画面()
        {
            InitializeComponent();

            dis_height= System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height;
            dis_width=System.Windows.Forms.Screen.PrimaryScreen.Bounds.Width;
            pos_max = Tobii.pos_max;
            while (Tobii. 眼球位置_L[0] == 0 || Tobii. 眼球位置_R[0] == 100) { }//両目とれるまでここにとどまる
            diff_in = Tobii. 眼球位置_R[0]-Tobii. 眼球位置_L[0];
            posY_in = (Tobii.眼球位置_L[1] + Tobii.眼球位置_R[1] )/ 2;

            pictureBoxIpl1.Width = dis_width;
            pictureBoxIpl1.Height = dis_height;
            frame = Cv.CreateImage(new CvSize(dis_width, dis_height), BitDepth.U8, 3);
            background = Cv.CreateImage(new CvSize(dis_width, dis_height), BitDepth.U8, 3);
            background=メイン画面.background;
            pictureBoxIpl1.ImageIpl = background;
            window_size = new CvSize(メイン画面.window[0], メイン画面.window[1]);
            point_old = new CvPoint(window_size.Width / 2, window_size.Height / 2);
            許容半径 = メイン画面.radius;

            PC=new System.Diagnostics.PerformanceCounter[3];

            タイマー開始();
        }

        public FaceDetect()
        {
            CheckMemoryLeak();

            // CvHaarClassifierCascade, cvHaarDetectObjects

            CvColor[] colors = new CvColor[]{
                new CvColor(0,0,255),
                new CvColor(0,128,255),
                new CvColor(0,255,255),
                new CvColor(0,255,0),
                new CvColor(255,128,0),
                new CvColor(255,255,0),
                new CvColor(255,0,0),
                new CvColor(255,0,255),
            };

            const double Scale = 1.14;
            const double ScaleFactor = 1.0850;
            const int MinNeighbors = 2;

            using (IplImage img = new IplImage(FilePath.Image.Yalta, LoadMode.Color))
            using (IplImage smallImg = new IplImage(new CvSize(Cv.Round(img.Width / Scale), Cv.Round(img.Height / Scale)), BitDepth.U8, 1))
            {
                using (IplImage gray = new IplImage(img.Size, BitDepth.U8, 1))
                {
                    Cv.CvtColor(img, gray, ColorConversion.BgrToGray);
                    Cv.Resize(gray, smallImg, Interpolation.Linear);
                    Cv.EqualizeHist(smallImg, smallImg);
                }

                using (var cascade = CvHaarClassifierCascade.FromFile(FilePath.Text.HaarCascade))  
                using (var storage = new CvMemStorage())
                {
                    storage.Clear();

                    // 顔の検出
                    Stopwatch watch = Stopwatch.StartNew();
                    CvSeq<CvAvgComp> faces = Cv.HaarDetectObjects(smallImg, cascade, storage, ScaleFactor, MinNeighbors, 0, new CvSize(30, 30));
                    watch.Stop();
                    Console.WriteLine("detection time = {0}ms\n", watch.ElapsedMilliseconds);

                    // 検出した箇所にまるをつける
                    for (int i = 0; i < faces.Total; i++)
                    {
                        CvRect r = faces[i].Value.Rect;
                        CvPoint center = new CvPoint
                        {
                            X = Cv.Round((r.X + r.Width * 0.5) * Scale),
                            Y = Cv.Round((r.Y + r.Height * 0.5) * Scale)
                        };
                        int radius = Cv.Round((r.Width + r.Height) * 0.25 * Scale);
                        img.Circle(center, radius, colors[i % 8], 3, LineType.AntiAlias, 0);
                    }
                }

                // ウィンドウに表示
                CvWindow.ShowImages(img);
            }
        }

 public Snake()
 {
     using (IplImage src = new IplImage(Const.ImageCake, LoadMode.GrayScale))
     using (IplImage dst = new IplImage(src.Size, BitDepth.U8, 3))
     {
         CvPoint[] contour = new CvPoint[100];
         CvPoint center = new CvPoint(src.Width / 2, src.Height / 2);
         for (int i = 0; i < contour.Length; i++)
         {
             contour[i].X = (int)(center.X * Math.Cos(2 * Math.PI * i / contour.Length) + center.X);
             contour[i].Y = (int)(center.Y * Math.Sin(2 * Math.PI * i / contour.Length) + center.Y);
         }
         Console.WriteLine("Press any key to snake\nEsc - quit");
         using (CvWindow w = new CvWindow())
         {
             while (true)
             {
                 src.SnakeImage(contour, 0.45f, 0.35f, 0.2f, new CvSize(15, 15), new CvTermCriteria(1), true);
                 src.CvtColor(dst, ColorConversion.GrayToRgb);
                 for (int i = 0; i < contour.Length - 1; i++)
                 {
                     dst.Line(contour[i], contour[i + 1], new CvColor(255, 0, 0), 2);
                 }
                 dst.Line(contour[contour.Length - 1], contour[0], new CvColor(255, 0, 0), 2);
                 w.Image = dst;
                 int key = CvWindow.WaitKey();
                 if (key == 27)
                 {
                     break;
                 }
             }
         }
     }
 }

        public Contour()
        {
            // cvContourArea, cvArcLength
            // 輪郭によって区切られた領域の面積と，輪郭の長さを求める
            
            const int SIZE = 500;

            // (1)画像を確保し初期化する
            using (CvMemStorage storage = new CvMemStorage())
            using (IplImage img = new IplImage(SIZE, SIZE, BitDepth.U8, 3))
            {
                img.Zero();
                // (2)点列を生成する 
                CvSeq<CvPoint> points = new CvSeq<CvPoint>(SeqType.PolyLine, storage);
                CvRNG rng = new CvRNG((ulong)DateTime.Now.Ticks);
                double scale = rng.RandReal() + 0.5;
                CvPoint pt0 = new CvPoint
                {
                    X = (int)(Math.Cos(0) * SIZE / 4 * scale + SIZE / 2),
                    Y = (int)(Math.Sin(0) * SIZE / 4 * scale + SIZE / 2)
                };
                img.Circle(pt0, 2, CvColor.Green);
                points.Push(pt0);
                for (int i = 1; i < 20; i++)
                {
                    scale = rng.RandReal() + 0.5;
                    CvPoint pt1 = new CvPoint
                    {
                        X = (int)(Math.Cos(i * 2 * Math.PI / 20) * SIZE / 4 * scale + SIZE / 2),
                        Y = (int)(Math.Sin(i * 2 * Math.PI / 20) * SIZE / 4 * scale + SIZE / 2)
                    };
                    img.Line(pt0, pt1, CvColor.Green, 2);
                    pt0.X = pt1.X;
                    pt0.Y = pt1.Y;
                    img.Circle(pt0, 3, CvColor.Green, Cv.FILLED);
                    points.Push(pt0);
                }
                img.Line(pt0, points.GetSeqElem(0).Value, CvColor.Green, 2);
                // (3)包含矩形，面積，長さを求める
                CvRect rect = points.BoundingRect(false);
                double area = points.ContourArea();
                double length = points.ArcLength(CvSlice.WholeSeq, 1);
                // (4)結果を画像に書き込む
                img.Rectangle(new CvPoint(rect.X, rect.Y), new CvPoint(rect.X + rect.Width, rect.Y + rect.Height), CvColor.Red, 2);
                string text_area = string.Format("Area:   wrect={0}, contour={1}", rect.Width * rect.Height, area);
                string text_length = string.Format("Length: rect={0}, contour={1}", 2 * (rect.Width + rect.Height), length);
                using (CvFont font = new CvFont(FontFace.HersheySimplex, 0.7, 0.7, 0, 1, LineType.AntiAlias))
                {
                    img.PutText(text_area, new CvPoint(10, img.Height - 30), font, CvColor.White);
                    img.PutText(text_length, new CvPoint(10, img.Height - 10), font, CvColor.White);
                }
                // (5)画像を表示，キーが押されたときに終了 
                using (CvWindow window = new CvWindow("BoundingRect", WindowMode.AutoSize))
                {
                    window.Image = img;
                    CvWindow.WaitKey(0);
                }
            }
        }

 /// <summary>
 /// helper function:
 /// finds a cosine of Angle between vectors
 /// from pt0->pt1 and from pt0->pt2 
 /// </summary>
 /// <param name="pt1"></param>
 /// <param name="pt2"></param>
 /// <param name="pt0"></param>
 /// <returns></returns>
 static double Angle(CvPoint pt1, CvPoint pt2, CvPoint pt0)
 {
     double dx1 = pt1.X - pt0.X;
     double dy1 = pt1.Y - pt0.Y;
     double dx2 = pt2.X - pt0.X;
     double dy2 = pt2.Y - pt0.Y;
     return (dx1 * dx2 + dy1 * dy2) / Math.Sqrt((dx1 * dx1 + dy1 * dy1) * (dx2 * dx2 + dy2 * dy2) + 1e-10);
 }

        public Watershed()
        {
            // cvWatershed
            // マウスで円形のマーカー（シード領域）の中心を指定し，複数のマーカーを設定する．
            // このマーカを画像のgradientに沿って広げて行き，gradientの高い部分に出来る境界を元に領域を分割する．
            // 領域は，最初に指定したマーカーの数に分割される． 

            // (2)画像の読み込み，マーカー画像の初期化，結果表示用画像領域の確保を行なう
            using (IplImage srcImg = new IplImage(Const.ImageGoryokaku, LoadMode.AnyDepth | LoadMode.AnyColor))
            using (IplImage dstImg = srcImg.Clone())
            using (IplImage dspImg = srcImg.Clone())
            using (IplImage markers = new IplImage(srcImg.Size, BitDepth.S32, 1))
            {
                markers.Zero();

                // (3)入力画像を表示しシードコンポーネント指定のためのマウスイベントを登録する
                using (CvWindow wImage = new CvWindow("image", WindowMode.AutoSize))
                {
                    wImage.Image = srcImg;
                    // クリックにより中心を指定し，円形のシード領域を設定する   
                    int seedNum = 0;
                    wImage.OnMouseCallback += delegate(MouseEvent ev, int x, int y, MouseEvent flags)
                    {
                        if (ev == MouseEvent.LButtonDown)
                        {
                            seedNum++;
                            CvPoint pt = new CvPoint(x, y);
                            markers.Circle(pt, 20, CvScalar.ScalarAll(seedNum), Cv.FILLED, LineType.Link8, 0);
                            dspImg.Circle(pt, 20, CvColor.White, 3, LineType.Link8, 0);
                            wImage.Image = dspImg;
                        }
                    };
                    CvWindow.WaitKey();
                }

                // (4)watershed分割を実行する  
                Cv.Watershed(srcImg, markers);

                // (5)実行結果の画像中のwatershed境界（ピクセル値=-1）を結果表示用画像上に表示する
                for (int i = 0; i < markers.Height; i++)
                {
                    for (int j = 0; j < markers.Width; j++)
                    {
                        int idx = (int)(markers.Get2D(i, j).Val0);
                        if (idx == -1)
                        {
                            dstImg.Set2D(i, j, CvColor.Red);
                        }
                    }
                }
                using (CvWindow wDst = new CvWindow("watershed transform", WindowMode.AutoSize))
                {
                    wDst.Image = dstImg;
                    CvWindow.WaitKey();
                }
            }

        }

        // !!!!!!!!!!!!!!!!Требуется отладка - похоже функция работает неправильно!
        // Функция поиска угла прямой, заданной двумя точками P1 и P2
        public static double GetAngle(CvPoint P1, CvPoint P2)
        {
            // считаем центральной точку находящуюся выше,
            CvPoint aCurr, aPrev, aNext;
            aCurr = (P1.Y < P2.Y) ? P1 : P2;
            aPrev = (P1.Y < P2.Y) ? P2 : P1;

            aNext.X = aCurr.X;
            aNext.Y = 1000;
            if (aCurr.X > aPrev.X) return -GetAngle(aCurr, aPrev, aNext);
            else return GetAngle(aCurr, aPrev, aNext);
        }

        private void OnClick_csv出力(object sender, EventArgs e)
        {
            if (合成画像 != null)
            {
                string 結果 = "";
                int x,y;
                int roi_w = 9;
                int roi_h = 9;

                CvSize roiSize = new CvSize(roi_w, roi_h);
                CvPoint roiPoint;
                for (x = 0; x < 合成画像.Width - roi_w; x++)
                {
                    System.Diagnostics.Debug.WriteLine(x + "\n" + 結果);

                    for (y = 0; y < 合成画像.Height - roi_h; y++)
                    {
                        string buff = "";
                        string type = 検査領域か判断(x,y,roi_w,roi_h);

                        if (type != "")//ちょっと高速化
                        {
                            roiPoint = new CvPoint(x, y);
                            Cv.SetImageROI(検査対象, new CvRect(roiPoint, roiSize));
                            if (type == "1") buff = csvフォーマットを取得(検査対象, roiSize, "1");
                            else if (type == "0") buff = csvフォーマットを取得(検査対象, roiSize, "0");
                        }
                        //if (checkBox_all.Checked)
                        //{
                        //    roiPoint = new CvPoint(x, y);
                        //    Cv.SetImageROI(検査対象, new CvRect(roiPoint, roiSize));
                        //    Cv.SetImageROI(マスク画像, new CvRect(roiPoint, roiSize));
                        //    if (マスク画像.Avg().Val0 == 0) buff = csvフォーマットを取得(検査対象, roiSize, "0");
                        //    else if (マスク画像.Avg().Val0 == 255) buff = csvフォーマットを取得(検査対象, roiSize, "1");
                        //}
                        //else if (checkBox_black.Checked)
                        //{
                        //    if (マスク画像.Avg().Val0 == 0) buff = csvフォーマットを取得(検査対象, roiSize, "0");
                        //}
                        //else
                        //{
                        //    if (マスク画像.Avg().Val0 == 255) buff = csvフォーマットを取得(検査対象, roiSize, "1");
                        //}

                        if(buff!="")結果 += buff + "\n";

                        Cv.ResetImageROI(マスク画像);
                        Cv.ResetImageROI(検査対象);
                    }
                }
                stringをcsv出力(結果,DateTime.Now.ToString("yy-MM-dd_")+this.Text);
            }
        }

        public static CvCircleSegment Approximate(CvPoint[] points)
        {
            CvPoint2D32f[] points2D32f = new CvPoint2D32f[points.Length];

            for (int i = 0; i < points.Length; i++)
            {
                points2D32f[i].X = (float)points[i].X;
                points2D32f[i].Y = (float)points[i].Y;
            }

            return Approximate(points2D32f);
        }

        public Watershed()
        {
            using (var srcImg = new IplImage(FilePath.Image.Goryokaku, LoadMode.AnyDepth | LoadMode.AnyColor))
            using (var dstImg = srcImg.Clone())
            using (var dspImg = srcImg.Clone())
            using (var markers = new IplImage(srcImg.Size, BitDepth.S32, 1))
            {
                markers.Zero();

                using (var window = new CvWindow("image", WindowMode.AutoSize))
                {
                    window.Image = srcImg;
                    // Mouse event  
                    int seedNum = 0;
                    window.OnMouseCallback += delegate(MouseEvent ev, int x, int y, MouseEvent flags)
                    {
                        if (ev == MouseEvent.LButtonDown)
                        {
                            seedNum++;
                            CvPoint pt = new CvPoint(x, y);
                            markers.Circle(pt, 20, CvScalar.ScalarAll(seedNum), Cv.FILLED, LineType.Link8, 0);
                            dspImg.Circle(pt, 20, CvColor.White, 3, LineType.Link8, 0);
                            window.Image = dspImg;
                        }
                    };
                    CvWindow.WaitKey();
                }

                Cv.Watershed(srcImg, markers);

                // draws watershed
                for (int i = 0; i < markers.Height; i++)
                {
                    for (int j = 0; j < markers.Width; j++)
                    {
                        int idx = (int)(markers.Get2D(i, j).Val0);
                        if (idx == -1)
                        {
                            dstImg.Set2D(i, j, CvColor.Red);
                        }
                    }
                }
                using (CvWindow wDst = new CvWindow("watershed transform", WindowMode.AutoSize))
                {
                    wDst.Image = dstImg;
                    CvWindow.WaitKey();
                }
            }

        }

        public ConvexHull()
        {
            using (IplImage img = Cv.CreateImage(new CvSize(500, 500), BitDepth.U8, 3))
            using (CvWindow window = new CvWindow("hull"))
            {
                Random rand = new Random();

                for (; ; )
                {
                    int count = rand.Next() % 100 + 1;

                    // create sequence of random points
                    CvPoint[] ptseq = new CvPoint[count];
                    for (int i = 0; i < ptseq.Length; i++)
                    {
                        ptseq[i] = new CvPoint
                        {
                            X = rand.Next() % (img.Width / 2) + img.Width / 4,
                            Y = rand.Next() % (img.Height / 2) + img.Height / 4
                        };
                    }

                    // draw points
                    Cv.Zero(img);
                    foreach(CvPoint pt in ptseq)
                    {
                        Cv.Circle(img, pt, 2, new CvColor(255, 0, 0), -1);
                    }

                    // find hull
                    CvPoint[] hull;
                    Cv.ConvexHull2(ptseq, out hull, ConvexHullOrientation.Clockwise);

                    // draw hull
                    CvPoint pt0 = hull.Last();
                    foreach(CvPoint pt in hull)
                    {
                        Cv.Line(img, pt0, pt, CvColor.Green);
                        pt0 = pt;
                    }


                    window.ShowImage(img);

                    if (Cv.WaitKey(0) == 27) // 'ESC'
                        break;
                }

            }
        }

        /// <summary>
        /// Calculate sum of line pixels (wrapper style)
        /// </summary>
        /// <param name="image"></param>
        /// <param name="pt1"></param>
        /// <param name="pt2"></param>
        /// <returns></returns>
        private CvScalar SumLinePixelsManaged(IplImage image, CvPoint pt1, CvPoint pt2)
        {            
            double blue_sum = 0, green_sum = 0, red_sum = 0;
            CvLineIterator iterator = new CvLineIterator(image, pt1, pt2, PixelConnectivity.Connectivity_8, false);

            foreach (CvScalar pixel in iterator)
            {
                blue_sum += pixel.Val0;   //blue_sum += iterator.ptr[0];
                green_sum += pixel.Val1;  //green_sum += iterator.ptr[1];
                red_sum += pixel.Val2;    //red_sum += iterator.ptr[2];

                PrintCoordinate(image, iterator);
            }
            return new CvScalar(blue_sum, green_sum, red_sum);
        }

        public BoundingRect()
        {
            // cvBoundingRect 
            // 点列を包含する矩形を求める

            // (1)画像とメモリストレージを確保し初期化する
            // (メモリストレージは、CvSeqを使わないのであれば不要)
            using (IplImage img = new IplImage(640, 480, BitDepth.U8, 3))
            using (CvMemStorage storage = new CvMemStorage(0))
            {
                img.Zero();
                CvRNG rng = new CvRNG(DateTime.Now);
                // (2)点列を生成する
                ///*
                // お手軽な方法 (普通の配列を使う)
                CvPoint[] points = new CvPoint[50];
                for (int i = 0; i < 50; i++)
                {
                    points[i] = new CvPoint()
                    {
                        X = (int)(rng.RandInt() % (img.Width / 2) + img.Width / 4),
                        Y = (int)(rng.RandInt() % (img.Height / 2) + img.Height / 4)
                    };
                    img.Circle(points[i], 3, new CvColor(0, 255, 0), Cv.FILLED);
                }
                //*/
                /*
                // サンプルに準拠した方法 (CvSeqを使う)
                CvSeq points = new CvSeq(SeqType.EltypePoint, CvSeq.SizeOf, CvPoint.SizeOf, storage);
                for (int i = 0; i < 50; i++) {
                    CvPoint pt = new CvPoint();
                    pt.X = (int)(rng.RandInt() % (img.Width / 2) + img.Width / 4);
                    pt.Y = (int)(rng.RandInt() % (img.Height / 2) + img.Height / 4);
                    points.Push(pt);
                    img.Circle(pt, 3, new CvColor(0, 255, 0), Cv.FILLED);
                }
                //*/
                // (3)点列を包含する矩形を求めて描画する
                CvRect rect = Cv.BoundingRect(points);
                img.Rectangle(new CvPoint(rect.X, rect.Y), new CvPoint(rect.X + rect.Width, rect.Y + rect.Height), new CvColor(255, 0, 0), 2);
                // (4)画像の表示，キーが押されたときに終了 
                using (CvWindow w = new CvWindow("BoundingRect", WindowMode.AutoSize, img))
                {
                    CvWindow.WaitKey(0);
                }
            }
        }

        /// <summary>
        /// Calculate sum of line pixels (native style)
        /// </summary>
        /// <param name="image"></param>
        /// <param name="pt1"></param>
        /// <param name="pt2"></param>
        /// <returns></returns>
        private CvScalar SumLinePixelsNative(IplImage image, CvPoint pt1, CvPoint pt2)
        {
            CvLineIterator iterator;
            int blue_sum = 0, green_sum = 0, red_sum = 0;
            int count = Cv.InitLineIterator(image, pt1, pt2, out iterator, PixelConnectivity.Connectivity_8, false);

            for (int i = 0; i < count; i++)
            {
                blue_sum += Marshal.ReadByte(iterator.Ptr, 0);  //blue_sum += iterator.ptr[0];
                green_sum += Marshal.ReadByte(iterator.Ptr, 1); //green_sum += iterator.ptr[1];
                red_sum += Marshal.ReadByte(iterator.Ptr, 2);   //red_sum += iterator.ptr[2];

                Cv.NEXT_LINE_POINT(iterator);

                PrintCoordinate(image, iterator);
            }
            return new CvScalar(blue_sum, green_sum, red_sum);
        }