2011/1/4 Eitan Isaacson <
eitan monotonous org>:
> Looks like your webcam is not automatically getting picked up by gstreamer.
> run gstreamer-properties (in Ubuntu it's in the gnome-media package), and
> make sure the video default input works, or configure it appropriately.
>
> 2011/1/4 Helios <
heliooos gmail com>
>>
>> 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:
>>
>> petra 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
>> VAROV�� chybn�oura: propojen�ez elementu spot�e
>> petra 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 instalovan�-installation skript vr�l
>> chybov�us 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 <
eitan monotonous org>:
>> > On Sat, Jan 1, 2011 at 1:56 PM, Helios <
heliooos 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
>
>
