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How to read tiff in C# and crop it

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Sample code to read tiff in C# and cropp it

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  1. Bitmap comments = null;
  2.             string input = "somepath";
  3.             // Open a Stream and decode a TIFF image
  4.             using (Stream imageStreamSource = new FileStream(input, FileMode.Open,                 FileAccess.Read, FileShare.Read))
  5.             {
  6.                 TiffBitmapDecoder decoder = new TiffBitmapDecoder(imageStreamSource,   BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
  7.  
  8.                 BitmapSource bitmapSource = decoder.Frames[0];
  9.                 using (Bitmap b = BitmapFromSource(bitmapSource))
  10.                 {
  11.                     Rectangle cropRect = new Rectangle(169, 1092, 567, 200);
  12.                     comments = new Bitmap(cropRect.Width, cropRect.Height);
  13.  
  14.                     //first cropping
  15.                     using (Graphics g = Graphics.FromImage(comments))
  16.                     {
  17.                         g.DrawImage(b, new Rectangle(0, 0, comments.Width, comments.Height),
  18.                                         cropRect,
  19.                                         GraphicsUnit.Pixel);
  20.                     }
  21.                 }
  22.             }

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