2003.04.08 14:04 "please help with LZW", by Hailin Shen
Thread
2003.04.08 14:24 "RE: please help with LZW", by John Carter
Hi
I'm not sure about 12 bit (my code only works for 1,4,8,and 24) but my [limited :-)] understanding would be that the LZW codes refer to H diffed color map indexes.
so
1) you should decode the LZW codes
this should produce a list of H diffed color map indecies
(i think how h diff works) is that the 1st is a real index,
the second is the difference between the 1st and second.
is the 3rd the diff from the 1st or 2nd (i'm not sure) so
2) produce a list of corrected colour map indecies
if you want send on the tiff file and i'll see what i can do I'd be curious as how how long it would be before my pc blue screened :-')
jc