OpenCVMat和Bitmap的转换

最常用的方式是:

Cv2.ImRead() 可以将位图文件转成Mat数据格式 Cv2.ImWrite() 可以将Mat数据格式保存到位图文件.

不通过读写文件作为转换介质的方法: private void testMatToPicture() { var mat = Cv2.ImRead("D:\\my_workspace\\opencv\\images\\lena.jpg", ImreadModes.Color); //方法1: Mat -> Bitmap class Bitmap bitmap = OpenCvSharp.Extensions.BitmapConverter.ToBitmap(mat); bitmap.Save("D:\\my_workspace\\opencv\\images\\1lena3.jpg", ImageFormat.Jpeg); //方法2: Mat -> byte[] byte[] bytes = mat.ToBytes(".jpg"); System.IO.File.WriteAllBytes("D:\\my_workspace\\opencv\\images\\1lena4.jpg", bytes); } private void testPictureToMat() { // byte[] -> Mat var bytes = System.IO.File.ReadAllBytes("D:\\my_workspace\\opencv\\images\\lena.jpg"); var colorMat = Mat.FromImageData(bytes, ImreadModes.Color); var grayMat = Mat.FromImageData(bytes, ImreadModes.Grayscale); // Bitmap class -> Mat Bitmap bitmap = new Bitmap("D:\\my_workspace\\opencv\\images\\lena.jpg"); var mat2 = OpenCvSharp.Extensions.BitmapConverter.ToMat(bitmap); Cv2.ImShow("colorMat", colorMat); Cv2.ImShow("grayMat", grayMat); Cv2.ImShow("mat2", mat2); Cv2.WaitKey(); Cv2.DestroyAllWindows(); ) }