I think you guys are going down a much harder road. This only makes
sense if and when e-mail with only a GIF is a normal type of e-mail that
people find acceptable. Otherwise, just score e-mail with only a GIF
and/or some extra bayes poison high and don't bother analyzing it.
Kelson wrote:
decoder wrote:
But that is a difficult task considering how many things are possible
with the GIF standard. This picture uses offsets and slow frame rates,
others use transparency etc. A simple way to block these images would
be to scan the GIF for offset frames. I don't think there is any valid
GIF which makes use of these techniques...
If "offset frames" means what I think it does, they're actually a fairly
common technique in animated GIFs where you only need to change part of
the image. After all, if you're changing a 30x50 section of a 200x200
image, why waste space on an extra 38,500 pixels?
--
Jo Rhett
Network/Software Engineer
Net Consonance
