[Image-SIG] resize gif in PIL

[Fredrik Lundh]

feihu_roger wrote:

> I use PIL to thumbnail or resizegif. 
> the original gif file :838*462.  38.75KB
> resize to  600*345, after save as new file.
> The new file is 86KB.
> Why is the small gif Larger then original gif file.

a nearest-neighbour resampling can in fact make the image harder to 
compress with a non-lossy algorithm, but it's probably mostly because 
PIL doesn't use a full LZW compressor, originally for legal reasons, but 
these days mostly because people have better things to do than to write 
code for a 20-year old crap format designed by a dead company using a 
patent owned by a bunch of utter nincompoops.

are you sure you cannot use JPEG (for photographic images) or PNG (for 
graphics) instead?

</F>