on images, google for "captcha"
--
Hugo Ahlenius
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| -----Original Message-----
| From: Mark Drew [mailto:[EMAIL PROTECTED]
| Sent: Saturday, June 05, 2004 10:38
| To: CF-Talk
| Subject: Re: Password in Image Technology
|
| I think the question is more a how-to, I have been reading
| the image functions in PHP for creatnig new images from PNG's
| or simply from scratch. That is how a lot of sites do it by
| adding an overlay and adding a filter to a set of
| characters... so you could do the following in PGP:
| Create image
| add text
| add overlay to confuse it
| add a distortion filter to confuse OCR systems
|
|
| I hope this helps (as you can run PGP and CF together on most
| systems!)
|
|
| Regards
|
| Mark Drew
|
| On Fri, 04 Jun 2004 15:02:48 -0400, Claude Schneegans
| <[EMAIL PROTECTED]> wrote:
| >
| > >>the image is obscurred so OCR software can't read the
| "special code"
| >
| > Exact, and some use similar character, like I and 1, Z and
| 2, S and 5, etc. in order to goof the OCR systems even more.
| >
| > --
| > _______________________________________
| > REUSE CODE! Use custom tags;
| > See http://www.contentbox.com/claude/customtags/tagstore.cfm
| > (Please send any spam to this address: [EMAIL PROTECTED])
| > Thanks.
| >
| >
|
|
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