At 9/7/2006 05:53 PM, David W. Fenton wrote:
>> But you can zip TIF, and the end file size is less than 1/3 (I think
>> it's close to 1/4).
>
>But it's still larger than the compressed PNG, and barely smaller
>than the uncompressed PNG:
>
> original zipped
>TIF 231KB 50KB
>PNG 53KB 49KB
>GIF 107KB 107KB
>
>The GIF, of course, does not compress at all, as it's internally
>compressed already.
>
>And, of course, if you're dealing with a compressed ZIP, then it's
>different, still. Here are the results:
>
> original zipped
>Uncompressed TIF 231KB 50KB
>LZW TIF 122KB 104KB
>Huffman encoding 89KB 53KB
>FAX-CCITT 3 90KB 56KB
>Packbits 229KB 43KB
Good work !!
Is there a reason that you didn't try FAX-CCITT 4?
That is (supposedly) the best TIF compression for a bitonal image.
(If you don't have that capability, send me the image off-list and I'll try
it out.)
Phil Daley < AutoDesk >
http://www.conknet.com/~p_daley
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