problems with GDI+ and tiff images

[Asfar]

I am using GDI+ to load a tiff image and write a string to it and save the
tiff image to another file.

I can save the image with only LZW Compression and not abel to save with
CCITT4 compression. If I use CCITT4 compression I get an invalid paramter
error when saving file.

The file saved with LZW compression has different resolution and tags then
the orignal image. Is there a way to save the image with the same tags as
the orignal image.

Thanks,
-Asfar

 

[Tamas Demjen]

I can save the image with only LZW Compression and not abel to save with
CCITT4 compression. If I use CCITT4 compression I get an invalid paramter
error when saving file.

Are you sure your images are 1-bit B&W? CCITT Group 4 is for images
where each pixel is represented by 1 bit only.

Tom

 

[Asfar]

My orignal image is 1bit B&W. When I create a bitmap object its not 1bit
B&W. So I guess i need to make sure that the new image is 1bit B&W.

-Asfar