At 10:46 PM +0100 4/9/07, Tijnema ! wrote:
On 4/9/07, tedd <tedd@xxxxxxxxxxxx> wrote:
It doesn't need to be complicated, just random placed pixels on the
image from a selection of colors would provide millions of
permutations.
Cheers,
tedd
But then OCR would still work, as when somebody scans a document,
there are also some "not white" pixels.
Tijnema
Tijnema:
An OCR is an Optical Character Reader -- it's design is to recognize
characters (A-Z 0-9), not images.
That's the reason why I previously used the term "OCR-like"
application -- meaning that it would be designed/programmed to "see"
the differences between images and then make a decision as to what to
do. That requires more effort than an OCR program.
Add to that, that every image could present a new problem to decipher
and you have the makings of a formidable deterrent. That's what
asirra is all about, see:
http://www.asirra.com/examples/ExampleService.html
With millions of different images and more being added, it presents a
considerable challenge to crack.
Cheers,
tedd
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