Re: modified webcam software for visually impaired

[Helios <heliooos gmail com>]

Ok,
my sister plans to upgrade to newer Vinux, whis is based on Ubuntu
10.10, so I will wait and try this again in the new system.

regards

Helios

2011/1/4 Eitan Isaacson <eitan monotonous org>:
> Hey
> I am using Fedora where it works, not Ubuntu, but it seems
> like frei0r-plugins is pulling in an incomplete opencv package.
> see https://bugs.launchpad.net/ubuntu/+source/opencv/+bug/459940
> The workaround they suggest is to remove frei0r-plugins which is not an
> option since you need it.
> Try installing libcv-dev since it contains the missing file.
> Cheers,
>   Eitan.
> 2011/1/4 Helios <heliooos gmail com>
>>
>> Ok,
>> I got that GUI and also:
>>
>> petra HP550:/home/psychopetra/Plocha$ gstreamer-properties
>> gstreamer-properties-Message: Skipping unavailable plugin 'artsdsink'
>> gstreamer-properties-Message: Skipping unavailable plugin 'esdsink'
>> gstreamer-properties-Message: Skipping unavailable plugin 'glimagesink'
>> gstreamer-properties-Message: Skipping unavailable plugin 'sdlvideosink'
>> gstreamer-properties-Message: Skipping unavailable plugin 'v4lmjpegsrc'
>> gstreamer-properties-Message: Skipping unavailable plugin 'qcamsrc'
>> gstreamer-properties-Message: Skipping unavailable plugin 'esdmon'
>> petra HP550:/home/psychopetra/Plocha$
>>
>> And all looks to be OK, testing also works. However, the problem remains:
>>
>> 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
>> VAROVÁNÍ: chybná roura: propojení bez elementu spotřebiče
>> petra HP550:/home/psychopetra/Plocha$
>>
>> I added some screenshots so maybe there is somewhere incorrectly set.
>>
>> Helios
>>
>>
>>
>> 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
>> >> VAROVÁNÍ: chybná roura: propojení bez elementu spotřebiče
>> >> 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 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 <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
>> >
>> >
>>
>>
>>
>> --
>> S pozdravem
>>
>> Helios
>
>



-- 
S pozdravem

Helios