线的骨架提取

        private string imgPath;
        private RectLatLng bound;
        private Matrix<float> pDst;        
        private Point curPt;

        public LineRecognize(string imgPath, RectLatLng bound)
        {
            curPt = new Point(0, 0);
            try
            {
                this.imgPath = imgPath;
                this.bound = bound;
                Image<Bgr, Byte> img = new Image<Bgr, Byte>(imgPath);
                // 提取线的目标图像
                Image<Gray, Byte> dstImg = new Image<Gray, Byte>(img.Width, img.Height);
                // 生成灰度图
                Image<Gray, Byte> gray = img.Convert<Gray, Byte>();
                // 二值化（翻转像素）
                Image<Gray, Byte> binary = gray.ThresholdBinaryInv(new Gray(230), new Gray(255));

                Matrix<float> pSrc = new Matrix<float>(binary.Rows, binary.Cols);
                pDst = new Matrix<float>(binary.Rows, binary.Cols);
                
                // 细化
                CvInvoke.cvConvertScale(binary, pSrc, 1.0f, 0);
                MorphologicalThinning(pSrc, pDst);
                CvInvoke.cvConvertScale(pDst, dstImg, 256.0f, 0);
                // 保存
                dstImg.Bitmap.Save(imgPath + ".edge.png");