Multiple image spams: best practices?
Aside from the experimental OCR some folks are trying, what SA techniques are folks having good luck with for stopping those stock spams that are multiple, vertical images? Jeff C. -- Jeff Chan mailto:[EMAIL PROTECTED] http://www.surbl.org/
Re: Multiple image spams: best practices?
On Tuesday, August 8, 2006, 8:08:04 AM, Jeff Chan wrote: Aside from the experimental OCR some folks are trying, what SA techniques are folks having good luck with for stopping those stock spams that are multiple, vertical images? Any technique for single image stock spams would be welcomed too! Jeff C. -- Jeff Chan mailto:[EMAIL PROTECTED] http://www.surbl.org/
Re: Multiple image spams: best practices?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Jeff Chan wrote: On Tuesday, August 8, 2006, 8:08:04 AM, Jeff Chan wrote: Aside from the experimental OCR some folks are trying, what SA techniques are folks having good luck with for stopping those stock spams that are multiple, vertical images? Any technique for single image stock spams would be welcomed too! Je Well the OCR technique is quite effective in my tests, so far it works for jpegs and gifs, and I'm extending it to pngs. I will soon release a new version in the wiki. Any specific reason why you don't want to use OCR? Chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFE2K0aJQIKXnJyDxURAphWAJwI1YCe317NyCSEnIf0I+rV0WEeswCfV2cg I2jlyottqh+2/SlUA1S2UmM= =IJZu -END PGP SIGNATURE-
Re: Multiple image spams: best practices?
On Tue, 2006-08-08 at 08:22 -0700, Jeff Chan wrote: On Tuesday, August 8, 2006, 8:08:04 AM, Jeff Chan wrote: Aside from the experimental OCR some folks are trying, what SA techniques are folks having good luck with for stopping those stock spams that are multiple, vertical images? Any technique for single image stock spams would be welcomed too! I haven't had a single stock spam get through since adding the ImageInfo plugin. (Note this is not the same as the OCR plugin.) -Bill
Re: Multiple image spams: best practices?
On Tuesday, August 8, 2006, 8:26:18 AM, decoder decoder wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Jeff Chan wrote: On Tuesday, August 8, 2006, 8:08:04 AM, Jeff Chan wrote: Aside from the experimental OCR some folks are trying, what SA techniques are folks having good luck with for stopping those stock spams that are multiple, vertical images? Any technique for single image stock spams would be welcomed too! Je Well the OCR technique is quite effective in my tests, so far it works for jpegs and gifs, and I'm extending it to pngs. I will soon release a new version in the wiki. Any specific reason why you don't want to use OCR? I assume it's CPU intensive or at least adds some overhead to already busy SA servers Maybe it's a wrong assumption? Jeff C. -- Jeff Chan mailto:[EMAIL PROTECTED] http://www.surbl.org/
Re: Multiple image spams: best practices?
Jeff Chan wrote: On Tuesday, August 8, 2006, 8:08:04 AM, Jeff Chan wrote: Aside from the experimental OCR some folks are trying, what SA techniques are folks having good luck with for stopping those stock spams that are multiple, vertical images? Any technique for single image stock spams would be welcomed too! Jeff C. Well, I'm using the ImageInfo Plugin for some days now with quite good results (doesn't catch all tough) and I'm using the FuzzyOCR for a few hours too with positive results too... I guess these are the only real countermeasures against this type of spam at the moment because as long as you dont look at the picture itself you can't really distinguish a stock spam from a normal inline picture in a text message Just my 2c Matt
Re: Multiple image spams: best practices?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Jeff Chan wrote: On Tuesday, August 8, 2006, 8:26:18 AM, decoder decoder wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Jeff Chan wrote: On Tuesday, August 8, 2006, 8:08:04 AM, Jeff Chan wrote: Aside from the experimental OCR some folks are trying, what SA techniques are folks having good luck with for stopping those stock spams that are multiple, vertical images? Any technique for single image stock spams would be welcomed too! Je Well the OCR technique is quite effective in my tests, so far it works for jpegs and gifs, and I'm extending it to pngs. I will soon release a new version in the wiki. Any specific reason why you don't want to use OCR? I assume it's CPU intensive or at least adds some overhead to already busy SA servers Maybe it's a wrong assumption? Jeff C. I noticed that the OCR process itself does not seem to be so CPU consuming, but imagemagick was often consuming resources (which I replaced now). Anyway, sure it adds some overhead, but if you take into account that the whole test only even starts when an image is found, then this doesn't seem too bad to me. Not every mail I get contains an image, lets say every tenth maybe. That is acceptable for me at least. Chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFE2K5ZJQIKXnJyDxURAlWaAKCYOLLfL8akV269hH08MTJkHexadQCZAYKl UHALPQ5biQzppL+dIa2+NQ8= =yvbv -END PGP SIGNATURE-
