Problem with compression

[kparker]

Loic,

I'm having a problem with converting LZW TIFF images into CCITT 4 .

Here is the code I'm using:

Code: Select all

string imgPath = @"C:\Multipage.TIF";
axGdViewer1.DisplayFromFile(imgPath);
for (int i = 0; i < axGdViewer1.PageCount; i++)
            {   axImaging1.SetNativeImage(axImaging1.CreateClonedImage(axGdViewer1.GetNativeImage()));
                
                axImaging1.SaveAsTIFF("c:\\Single_page_" + (i+1) + ".tif", TifCompression.CompressionCCITT4); 
                axGdViewer1.DisplayNextFrame();
            }

The problem is that the saved TIFFs (Single_page_1.tif, ...) are all still have LZW compression.

Am I missing something?

Thanks,

[Loïc]

Hi,

You are probably trying to compress in ccitt4 image which are not bitonal (black & white).

Just add:

Code: Select all

axImaging1.ConvertTo1bpp();

After:

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   {   axImaging1.SetNativeImage(axImaging1.CreateClonedImage(axGdViewer1.GetNativeImage()));

With best regards,

Loïc