Pier Fumagalli wrote:
On 2 Sep 2005, at 16:23, Gianugo Rabellino wrote:
On 9/2/05, Pier Fumagalli <[EMAIL PROTECTED]> wrote:
Guys,
for one of our registration projects, we needed to verify that a
user is really in front of the browser (no automatons allowed). I
wrote, then, a little "text-warper" that randomly stretches text for
a user to see (and re-type) and writes out JPEG files.
In addition to that I wrote a little random-text generator and
encryptor (so that you can be sure the text displayed is nowhere in
your HTML). An example of a generated image is attached here.
Did you look at what Ugo did with captchas?
http://agylen.com/2005/05/16/captcha-validator-for-cocoon-forms/
Ciao,
Yep, but SVG IMVHO is quite overkill to generate a simple image... Plus
I suspect that the blurring algorithm is quite easy to recognize (in
terms of running a simple image analysis package over the generated
output).
I kinda like more random things! :-P :-P
Pier
Ugo's work built on some stuff I did a long time ago. I did a gaussian
blur on the text just as a proof of concept. Of course, the SVG filters
have displacement maps, so ideally you'd add one in addition to the
stuff that's already there.
Tony
