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Posted by Glenn on 11/05/05 21:57
Hi There,
I'm Glenn LeDuc, I work for an agency that helps people who are blind
and visually impaired find work here in Washington State. For the past
year or so I've been working on a making low cost devices to magnify
books and other texts and objects for people with low vision that
utilizes either a webcam or a composite video camera like a security
camera or a camcorder, attached to a PC or to a television.
Two of the features that people with some specific eye conditions find
very useful, that the commercial devices that cost big money have, are
the ability to display a negative of what is being viewed and the
ability to display "false colors", so for example, a black and white
page of regular text appears to be yellow text on a blue background.
On the webcam / PC side I've found a program called dscaler
(http://deinterlace.sourceforge.net/) that does the negative image
with video from a webcam or from a composite camera run through a usb
video digitizer. Also I've been told some hardware video processors
can do negative of what is being displayed on a camera or from a
video source in real time. The only devices that I've seen so far that
have this abiliity are pretty expensive in terms of what I'm reying to
come up with (~ $500 or more). I haven't had much luck finding
anything that does false colors, either on the PC side or the video
side.
I'm wondering if any of the video professional or enthusiasts that
read these groups could point me towards anything that could produce
the negative and false color video on eith a PC or when displayed on a
television? If anyone has any advice on this it would be greatly
appreciated.
Thanks Very Much,
Glenn
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