Hi Eitan, I am not sure if I did all correctly but.... I installed frei0r-filter (first I googled a little to find out what is it) from Ubuntu repository, but when I tried the supplied command, I got this output:
pe...@hp550:/home/psychopetra/Plocha$ gst-launch-0.10 autovideosrc ! ffmpegcolorspace ! frei0r-filter-bw0r ! ERROR: Could not load classifier cascade /usr/share/opencv/haarcascades/haarcascade_frontalface_alt2.xml ERROR: Could not load classifier cascade /usr/share/opencv/haarcascades/haarcascade_frontalface_alt2.xml VAROVÁNÍ: chybná roura: propojení bez elementu spotřebiče pe...@hp550:/home/psychopetra/Plocha$ It is in Czech - the last but one row means something like "Warning: incorrect pipe: connection without device element I tried to install python-opencv, but I again got this: E: yaml-mode: podproces instalovaný post-installation skript vrátil chybový status 1 (subprocess installed post-installation skrict returned error status 1) Helios Vinux 3.0 (Ubuntu Lucid, Kernel 2.6.32-27-generic), Gnome 2.30.2, HP550 laptop: Intel Celeron, 1GB ram, Intel graphics 2011/1/4 Eitan Isaacson <ei...@monotonous.org>: > On Sat, Jan 1, 2011 at 1:56 PM, Helios <helio...@gmail.com> wrote: >> >> Hi, >> 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. -- S pozdravem Helios _______________________________________________ gnome-accessibility-list mailing list gnome-accessibility-list@gnome.org http://mail.gnome.org/mailman/listinfo/gnome-accessibility-list