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 classBitmap 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[] -> Matvar 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 -> MatBitmap 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();)
}