C#，使用ZXing 读取Data Matrix

直接使用BarcodeReader 并不能读取，通过不断的实验，采用把位图转换为byte[]后用DatamatrixReader 进行解码
如下：
//把位图转为byte
var bmpData = img.LockBits(new Rectangle(0, 0, img.Width, img.Height), ImageLockMode.ReadWrite, img.PixelFormat);
int count = bmpData.Stride * bmpData.Height;
byte[] pic = new byte[count];
Marshal.Copy(bmpData.Scan0, pic, 0, count);
img.UnlockBits(bmpData);
LuminanceSource source = new RGBLuminanceSource(pic, img.Width, img.Height);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
DataMatrixReader reader = new DataMatrixReader();
Result result = reader.decode(bitmap);