Question

我有一个位图，我克隆并指定一个矩形 - 当前矩形具有一定的宽度和高度值，我用它来检查QR码的矩形。我注意到这会检查左上角。我可以改变它来检查相同尺寸（宽度和高度）的右上角，右下角和左下角吗？

 Bitmap result = fullImg.Clone(new System.Drawing.Rectangle(0, 0, 375, 375), fullImg.PixelFormat);

非常感谢任何帮助。

for (int pg = 0; pg < inputDocument.PageCount; pg++)
            {

                string workGif = workingFilename.Replace(".pdf", string.Format(".{0}.gif", pg + 1));
                GhostscriptWrapper.GeneratePageThumb(workingFilename, workGif, pg + 1, 300, 300); // size (last two params) does not seem to have any effect
                using (var fullImg = new Bitmap(workGif))
                {  
                        Bitmap result = fullImg.Clone(new System.Drawing.Rectangle(0, 0, 375, 375), fullImg.PixelFormat);
                        string QRinfo = Process(result);
                        MessageBox.Show(QRinfo);

                        string[] qcode = QRinfo.Split('/');
                        string gid = qcode[qcode.Count() - 1];
                        Guid pgGuid = new Guid(gid);
                }        
            }

qr的处理方法

public string Process(Bitmap bitmap)
    {
        var reader = new com.google.zxing.qrcode.QRCodeReader();

        try
        {
            LuminanceSource source = new RGBLuminanceSource(bitmap, bitmap.Width, bitmap.Height);
            var binarizer = new HybridBinarizer(source);
            var binBitmap = new BinaryBitmap(binarizer);
            return reader.decode(binBitmap).Text;
        }
        catch (Exception e)
        {
            return e.Message;
        }
    }

Answer 1

如果QRCodes始终位于角落，您可以使用图片框进行位图，然后使用RotateFlip方法旋转它：

Bitmap bp = new Bitmap("myImage.jpg");
pictureBox1.Image = bp;
bp.RotateFlip(RotateFlipType.Rotate90FlipNone);
pictureBox1.Invalidate();

为位图克隆绘制一个矩形

1 个答案: