[GM-help] Re:jpeg to tiff -unreadable files

[Ian S. <st...@ds...>]

Thanks for the info. Bob,

I need to use TIFF uncompressed, so this works for me:
gm convert -compress none -format tiff p25.jpg p25.tif

Ian.

On Sep 25, 2005, at 18:53, Bob Friesenhahn wrote:

> Actually, this organization is acceptable.  JPEG is a valid  
> compression scheme for TIFF and when you convert a JPEG file to  
> TIFF, the compression setting remains set to use JPEG compression.   
> This catches a lot of people by surprise. You could use an option  
> like '-compress none', 'compress lzw', or 'compress zip', to alter  
> the compression algorithm.
>