jpegs are usually the smallest, but the drawback is that the compression
is lossy - the image you uncompress is not _exactly_ what you
compressed. this isn't really a big deal for photos and such, so it's
generally the best for photorealistic images
gifs only support 256 colors, but the compression is lossless. thus
they're used mostly for line-drawing type images. the major drawback is
you have to listen to the flamewars about the licensing issues of the
compression algorithm. oh yeah, they are the only format that can do
animation.
the newest format, png, is designed to do most everything (it will
probably take over at somepoint). unfortunately browser support for them
is currently spotty at best.
i don't really use tiff much, but i've heard they're the format of choice
for graphic designers and such who need large, high quality images

matt

On 23 Dec 1999, Arcady Genkin wrote:

> Looking for a comparison chart of different image formats, such as
> tiff, jpeg, etc. I wonder what format is it more appropriate to scan
> images into.
> 
> Thanks,
> -- 
> Arcady Genkin                                http://wgaf.dyndns.org
> "'What good is my pity? Is not the pity the cross upon which he who
> loves man is nailed?..'" (Zarathustra - F. Nietzsche)
> 
> 
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