为位图克隆绘制矩形
本文关键字:绘制 位图 | 更新日期: 2023-09-27 18:02:44
我有一个位图,我克隆并指定一个矩形-当前矩形有一定的宽度和高度值,我用来检查矩形的QR码。我注意到这个检查了左上角。我能改变这个检查右上角,右下角和左下角的相同大小(宽度和高度)?
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
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;
}
}
如果QRCodes总是在角上,你可以为位图使用一个图片框,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();