Re: modified webcam software for visually impaired

On Sat, Jan 1, 2011 at 1:56 PM, Helios <heliooos gmail com> wrote:
we are just testing a standard webcam to be used as a digital
magnifier for visually impaired users. Such gadget could be very
useful, as many low vision users need such device, but those
commercially available are Windows only and mostly very expensive.
We tested common Genius webcam with manual focus feature using Cheese,
however, there are no features needed for this kind of users (supplied
by my visually impaired sister):
- inverse color mode
gst-launch-0.10 autovideosrc ! ffmpegcolorspace ! frei0r-filter-bw0r ! frei0r-filter-invert0r ! ffmpegcolorspace ! autovideosink 

- color profiles (eg. yellow text on blue background - simple runs in
BW mode only and replaces black with yellow and white with blue)
gst-launch-0.10 autovideosrc ! ffmpegcolorspace ! frei0r-filter-contrast0r contrast=0.7 ! frei0r-filter-bw0r ! frei0r-filter-invert0r ! frei0r-filter-levels white-output=0.06 black-output=0.27 channel=2 ! ffmpegcolorspace ! autovideosink 

- guiding lines (can provide some screenshots)

There should be an easy way of doing that.
- and some others

The options are limitless! And it would be fun to create a simple UI for all that.

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