[REBOL] Re: Preventing Automated Website Registrations
From: joel:neely:fedex at: 9-May-2002 16:30
Hi, Ted,
Thaddeus Serpa wrote:
> I think a further twist could be to make different backgrounds for
> each of the image files, both for same and different characters.
> I was told that OCR filters can be used to decipher images.
>
Another variation that I forgot to mention earlier was to make the
character images with transparency, then place them in table cells
with different background colors (using the hex codes). A separate
piece of text could tell the visitor to e.g. ignore letters with
red backgrounds.
-jn-
