[thelist] Security code images

David Dorward evolt at david.us-lot.org
Tue Aug 3 09:11:13 CDT 2004


On 3 Aug 2004, at 15:01, Jono wrote:
> That means that an image (png) appears, and as far as I know, 
> "machines"
> cannot read images, only text.  I am only assuming here.  Am I way off 
> on
> this?

Optical Character Recognition can turn an image back into text. The 
trick is to find a balance between unOCRable and unreadable by humans 
while providing an alternative route that doesn't require the end user 
(who might be blind) to use a browser which supports graphics.



--
David Dorward
      <http://dorward.me.uk/>
<http://blog.dorward.me.uk/>



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