我有一个tiff文件,在原始创建和保存期间有压缩类型“LZW”.

System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(800, 1000); 
Graphics g = Graphics.FromImage(bitmap);
fileName = saveDirectory + id + ".tif";
bitmap.Save(fileName, ImageFormat.Tiff);

所以我试图将其压缩改为CCIT： –

Bitmap myBitmap;
myBitmap = new Bitmap(fileName);
ImageCodecInfo myImageCodecInfo;
myImageCodecInfo = GetEncoderInfo("image/tiff");
System.Drawing.Imaging.Encoder myEncoder;
myEncoder = System.Drawing.Imaging.Encoder.Compression;
EncoderParameters myEncoderParameters;
myEncoderParameters = new EncoderParameters(1);
EncoderParameter myEncoderParameter;      
myEncoderParameter = new EncoderParameter(myEncoder,(long)EncoderValue.CompressionCCITT4);
myEncoderParameters.Param[0] = myEncoderParameter;
myBitmap.Save(new_fileName);

    private static ImageCodecInfo GetEncoderInfo(String mimeType)
    {
      int j;
      ImageCodecInfo[] encoders;
      encoders = ImageCodecInfo.GetImageEncoders();
      for (j = 0; j < encoders.Length; ++j)
        {
            if (encoders[j].MimeType == mimeType)
            return encoders[j];
        }
      return null;
    }

但是,在完成该过程后,我的文件属性仍然表示它是“LZW压缩”类型.

任何人都可以向我解释我在哪里出错吗？

解决方法:

将您的最后一行更改为：

myBitmap.Save(new_fileName, myImageCodecInfo, myEncoderParameters);