C# OpenCvSharp.IplImage類代碼示例

        public static OpenCvSharp.IplImage GetSub(this OpenCvSharp.IplImage ipl, OpenCvSharp.CvRect subRect)
        {
            if (ipl == null)
                throw new ArgumentNullException("ipl", "ipl is null.");

            var boundingRect = new CvRect(0, 0, ipl.Width, ipl.Height);

            if (!boundingRect.Contains(subRect))
                throw new InvalidOperationException("subRect is outside of ipl");

            try
            {
                ipl.SetROI(subRect);

                OpenCvSharp.IplImage sub = new IplImage(
                    ipl.GetSize(),
                    ipl.Depth,
                    ipl.NChannels);

                ipl.Copy(sub);
                return sub;
            }
            finally
            {
                ipl.ResetROI();
            }
        }

        public ActionResult Canny(HttpPostedFileBase imageData)
        {
            if (imageData != null)
            {
                using (var image = IplImage.FromStream(imageData.InputStream, LoadMode.Color))
                {
                    using (var grayImage = new IplImage(image.Size, BitDepth.U8, 1))
                    using (var cannyImage = new IplImage(image.Size, BitDepth.U8, 1))
                    {
                        Cv.CvtColor(image, grayImage, ColorConversion.BgrToGray);
                        Cv.Canny(grayImage, cannyImage, 60, 180);

                        byte[] cannyBytes = cannyImage.ToBytes(".png");
                        string base64 = Convert.ToBase64String(cannyBytes);
                        ViewBag.Base64Image = base64;

                        byte[] originalBytes = image.ToBytes(".png");
                        string base64Org = Convert.ToBase64String(originalBytes);
                        ViewBag.Base64OrgImage = base64Org;

                        byte[] grayBytes = grayImage.ToBytes(".png");
                        string base64Gray = Convert.ToBase64String(grayBytes);
                        ViewBag.Base64GrayImage = base64Gray;
                    }
                }
            }

            return View();
        }

        public void SetSize(IplImage i)
        {

            this.Size = new Size(i.Size.Width+10, i.Size.Height+10);

            this.pictureBoxIpl1.ImageIpl = i;
        }

        public DrawToHdc()
        {
            CvRect roi = new CvRect(320, 260, 100, 100);        // region of roosevelt's face

            using (IplImage src = new IplImage(Const.ImageYalta, LoadMode.Color))
            using (IplImage dst = new IplImage(roi.Size, BitDepth.U8, 3))
            {
                src.ROI = roi;

                using (Bitmap bitmap = new Bitmap(roi.Width, roi.Height, PixelFormat.Format32bppArgb))
                using (Graphics g = Graphics.FromImage(bitmap))
                {
                    //BitmapConverter.DrawToGraphics(src, g, new CvRect(new CvPoint(0, 0), roi.Size));
                    IntPtr hdc = g.GetHdc();
                    BitmapConverter.DrawToHdc(src, hdc, new CvRect(new CvPoint(0,0), roi.Size));
                    g.ReleaseHdc(hdc);

                    g.DrawString("Roosevelt", new Font(FontFamily.GenericSerif, 12), Brushes.Red, 20, 0);
                    g.DrawEllipse(new Pen(Color.Red, 4), new Rectangle(20, 20, roi.Width/2, roi.Height/2));

                    dst.CopyFrom(bitmap);
                }

                src.ResetROI();                

                using (new CvWindow("src", src))
                using (new CvWindow("dst", dst))
                {
                    Cv.WaitKey();
                }
            }
        }

        public CornerDetect()
        {
            // cvGoodFeaturesToTrack, cvFindCornerSubPix
            // 畫像中のコーナー（特徴點）検出

            int cornerCount = 150;

            using (IplImage dstImg1 = new IplImage(Const.ImageLenna, LoadMode.AnyColor | LoadMode.AnyDepth))
            using (IplImage dstImg2 = dstImg1.Clone())
            using (IplImage srcImgGray = new IplImage(Const.ImageLenna, LoadMode.GrayScale))
            using (IplImage eigImg = new IplImage(srcImgGray.GetSize(), BitDepth.F32, 1))
            using (IplImage tempImg = new IplImage(srcImgGray.GetSize(), BitDepth.F32, 1))
            {
                CvPoint2D32f[] corners;
                // (1)cvCornerMinEigenValを利用したコーナー検出
                Cv.GoodFeaturesToTrack(srcImgGray, eigImg, tempImg, out corners, ref cornerCount, 0.1, 15);
                Cv.FindCornerSubPix(srcImgGray, corners, cornerCount, new CvSize(3, 3), new CvSize(-1, -1), new CvTermCriteria(20, 0.03));
                // (2)コーナーの描畫
                for (int i = 0; i < cornerCount; i++)
                    Cv.Circle(dstImg1, corners[i], 3, new CvColor(255, 0, 0), 2);
                // (3)cvCornerHarrisを利用したコーナー検出
                cornerCount = 150;
                Cv.GoodFeaturesToTrack(srcImgGray, eigImg, tempImg, out corners, ref cornerCount, 0.1, 15, null, 3, true, 0.01);
                Cv.FindCornerSubPix(srcImgGray, corners, cornerCount, new CvSize(3, 3), new CvSize(-1, -1), new CvTermCriteria(20, 0.03));
                // (4)コーナーの描畫
                for (int i = 0; i < cornerCount; i++)
                    Cv.Circle(dstImg2, corners[i], 3, new CvColor(0, 0, 255), 2);
                // (5)畫像の表示 
                using (new CvWindow("EigenVal", WindowMode.AutoSize, dstImg1)) 
                using (new CvWindow("Harris", WindowMode.AutoSize, dstImg2))
                {
                    Cv.WaitKey(0);
                }
            }
        }

        public SaveImage()
        {
            using (IplImage img = new IplImage(Const.Image16bit, LoadMode.Color))
            {
                // JPEG quality test
                img.SaveImage("q000.jpg", new JpegEncodingParam(0));
                img.SaveImage("q025.jpg", new JpegEncodingParam(25));
                img.SaveImage("q050.jpg", new JpegEncodingParam(50));
                img.SaveImage("q075.jpg", new JpegEncodingParam(75));
                img.SaveImage("q100.jpg", new JpegEncodingParam(100));

                using (IplImage q000 = new IplImage("q000.jpg", LoadMode.Color))
                using (IplImage q025 = new IplImage("q025.jpg", LoadMode.Color))
                using (IplImage q050 = new IplImage("q050.jpg", LoadMode.Color))
                using (IplImage q075 = new IplImage("q075.jpg", LoadMode.Color))
                using (IplImage q100 = new IplImage("q100.jpg", LoadMode.Color))
                using (CvWindow w000 = new CvWindow("quality 0", q000))
                using (CvWindow w025 = new CvWindow("quality 25", q025))
                using (CvWindow w050 = new CvWindow("quality 50", q050))
                using (CvWindow w075 = new CvWindow("quality 75", q075))
                using (CvWindow w100 = new CvWindow("quality 100", q100))
                {
                    Cv.WaitKey();
                }
            }
        }

        public ConvertToBitmapSource()
        {
            BitmapSource bs = null;

            // OpenCVによる畫像処理 (Threshold)
            using (IplImage src = new IplImage(Const.ImageLenna, LoadMode.GrayScale))
            using (IplImage dst = new IplImage(src.Size, BitDepth.U8, 1))
            {
                src.Smooth(src, SmoothType.Gaussian, 5);
                src.Threshold(dst, 0, 255, ThresholdType.Otsu);
                // IplImage -> BitmapSource
                bs = dst.ToBitmapSource();
                //bs = BitmapSourceConverter.ToBitmapSource(dst);
            }

            // WPFのWindowに表示してみる
            Image image = new Image { Source = bs };
            Window window = new Window
            {
                Title = "from IplImage to BitmapSource",
                Width = bs.PixelWidth,
                Height = bs.PixelHeight,
                Content = image
            };

            Application app = new Application();
            app.Run(window);
        }

        public CornerDetect()
        {
            int cornerCount = 150;

            using (IplImage dstImg1 = new IplImage(FilePath.Image.Lenna, LoadMode.AnyColor | LoadMode.AnyDepth))
            using (IplImage dstImg2 = dstImg1.Clone())
            using (IplImage srcImgGray = new IplImage(FilePath.Image.Lenna, LoadMode.GrayScale))
            using (IplImage eigImg = new IplImage(srcImgGray.GetSize(), BitDepth.F32, 1))
            using (IplImage tempImg = new IplImage(srcImgGray.GetSize(), BitDepth.F32, 1))
            {
                CvPoint2D32f[] corners;
                Cv.GoodFeaturesToTrack(srcImgGray, eigImg, tempImg, out corners, ref cornerCount, 0.1, 15);
                Cv.FindCornerSubPix(srcImgGray, corners, cornerCount, new CvSize(3, 3), new CvSize(-1, -1), new CvTermCriteria(20, 0.03));

                for (int i = 0; i < cornerCount; i++)
                    Cv.Circle(dstImg1, corners[i], 3, new CvColor(255, 0, 0), 2);

                cornerCount = 150;
                Cv.GoodFeaturesToTrack(srcImgGray, eigImg, tempImg, out corners, ref cornerCount, 0.1, 15, null, 3, true, 0.01);
                Cv.FindCornerSubPix(srcImgGray, corners, cornerCount, new CvSize(3, 3), new CvSize(-1, -1), new CvTermCriteria(20, 0.03));

                for (int i = 0; i < cornerCount; i++)
                    Cv.Circle(dstImg2, corners[i], 3, new CvColor(0, 0, 255), 2);

                using (new CvWindow("EigenVal", WindowMode.AutoSize, dstImg1)) 
                using (new CvWindow("Harris", WindowMode.AutoSize, dstImg2))
                {
                    Cv.WaitKey(0);
                }
            }
        }

        public Squares()
        {
            // create memory storage that will contain all the dynamic data
            CvMemStorage storage = new CvMemStorage(0);

            for (int i = 0; i < _names.Length; i++)
            {
                // load i-th image
                using (IplImage img = new IplImage(_names[i], LoadMode.Color))
                {
                    // create window and a trackbar (slider) with parent "image" and set callback
                    // (the slider regulates upper threshold, passed to Canny edge detector) 
                    Cv.NamedWindow(WindowName, WindowMode.AutoSize);

                    // find and draw the squares
                    DrawSquares(img, FindSquares4(img, storage));                    
                }

                // clear memory storage - reset free space position
                storage.Clear(); 

                // wait for key.
                // Also the function cvWaitKey takes care of event processing
                int c = Cv.WaitKey(0);
                if ((char)c == 27)
                    break;
            }

            Cv.DestroyWindow(WindowName);
        }

        public Undistort()
        {
            using (IplImage srcImg = new IplImage(FilePath.Image.Distortion, LoadMode.Color))
            using (IplImage dstImg = srcImg.Clone())
            {
                CvMat intrinsic, distortion;
                using (CvFileStorage fs = new CvFileStorage(FilePath.Text.Camera, null, FileStorageMode.Read))
                {
                    CvFileNode param = fs.GetFileNodeByName(null, "intrinsic");
                    intrinsic = fs.Read<CvMat>(param);
                    param = fs.GetFileNodeByName(null, "distortion");
                    distortion = fs.Read<CvMat>(param);
                }
                
                Cv.Undistort2(srcImg, dstImg, intrinsic, distortion);

                using (new CvWindow("Distortion", WindowMode.AutoSize, srcImg))
                using (new CvWindow("Undistortion", WindowMode.AutoSize, dstImg))
                {
                    CvWindow.WaitKey(0);
                }

                intrinsic.Dispose();
                distortion.Dispose();
            }
        }

        public Undistort()
        {
            // cvUndistort2
            // キャリブレーションデータを利用して，歪みを補正する

            // (1)補正対象となる畫像の読み込み
            using (IplImage srcImg = new IplImage(Const.ImageDistortion, LoadMode.Color))
            using (IplImage dstImg = srcImg.Clone())
            {

                // (2)パラメータファイルの読み込み
                CvMat intrinsic, distortion;
                using (CvFileStorage fs = new CvFileStorage(Const.XmlCamera, null, FileStorageMode.Read))
                {
                    CvFileNode param = fs.GetFileNodeByName(null, "intrinsic");
                    intrinsic = fs.Read<CvMat>(param);
                    param = fs.GetFileNodeByName(null, "distortion");
                    distortion = fs.Read<CvMat>(param);
                }

                // (3)歪み補正
                Cv.Undistort2(srcImg, dstImg, intrinsic, distortion);

                // (4)畫像を表示，キーが押されたときに終了
                using (CvWindow w1 = new CvWindow("Distortion", WindowMode.AutoSize, srcImg))
                using (CvWindow w2 = new CvWindow("Undistortion", WindowMode.AutoSize, dstImg))
                {
                    CvWindow.WaitKey(0);
                }

                intrinsic.Dispose();
                distortion.Dispose();
            }
        }

 private static void ShowCvWindow(IplImage image)
 {
     Cv.NamedWindow("window");
     Cv.ShowImage("window", image);
     Cv.WaitKey();
     Cv.DestroyWindow("window");
 }

        public Filter2D()
        {
            // cvFilter2D
            // ユーザが定義したカーネルによるフィルタリング

            // (1)畫像の読み込み
            using (IplImage srcImg = new IplImage(Const.ImageFruits, LoadMode.AnyDepth | LoadMode.AnyColor))
            using (IplImage dstImg = new IplImage(srcImg.Size, srcImg.Depth, srcImg.NChannels))
            {
                // (2)カーネルの正規化と，フィルタ処理
                float[] data = {    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
                                    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
                };
                CvMat kernel = new CvMat(1, 21, MatrixType.F32C1, data);

                Cv.Normalize(kernel, kernel, 1.0, 0, NormType.L1);
                Cv.Filter2D(srcImg, dstImg, kernel, new CvPoint(0, 0));

                // (3)結果を表示する
                using (CvWindow window = new CvWindow("Filter2D", dstImg))
                {
                    Cv.WaitKey(0);
                }
            }

        }

        public Resize()
        {
            // cvResize
            // 指定した出力畫像サイズに合うように、入力畫像のサイズを変更し出力する．

            // (1)畫像を読み込む
            using (IplImage src = new IplImage(Const.ImageSquare5, LoadMode.AnyColor | LoadMode.AnyDepth))
            {
                // (2)出力用畫像領域の確保を行なう
                CvSize size = new CvSize(src.Width * 2, src.Height * 2);
                using (IplImage dstNN = new IplImage(size, src.Depth, src.NChannels))
                using (IplImage dstCubic = new IplImage(size, src.Depth, src.NChannels))
                using (IplImage dstLinear = new IplImage(size, src.Depth, src.NChannels))
                using (IplImage dstLanczos = new IplImage(size, src.Depth, src.NChannels))                
                {
                    // (3)畫像のサイズ変更を行う
                    Cv.Resize(src, dstNN, Interpolation.NearestNeighbor);
                    Cv.Resize(src, dstCubic, Interpolation.Cubic);                    
                    Cv.Resize(src, dstLinear, Interpolation.Linear);
                    Cv.Resize(src, dstLanczos, Interpolation.Lanczos4);

                    // (4)結果を表示する
                    using (new CvWindow("src", src))
                    using (new CvWindow("dst NearestNeighbor", dstNN))
                    using (new CvWindow("dst Cubic", dstCubic))
                    using (new CvWindow("dst Linear", dstLinear))
                    using (new CvWindow("dst Lanczos4", dstLanczos))                    
                    {
                        Cv.WaitKey();
                    }
                }
            }
        }

        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);
            }
        }