[Pkg-scicomp-devel] Bug#594543: libhighgui2.1: Video capture from FireWire camera garbled (looks like stereo fields)

[Raphael Wimmer]

Package: libhighgui2.1
Version: 2.1.0-2
Severity: normal

*** Please type your report below this line ***
Capturing a video frame from a Point Grey FireFly MV (b&w) results in a  
garbled image (example attached).
This has been reproduced on three different computers using both a simple  
C program and a Python script.
When using Coriander, the image looks absolutely correct, however.

Interestingly, once I enable the "St. Field" decoding option in Coriander,  
the image looks like the garbled one captured by OpenCV.
That would suggest that OpenCV tries to decode the image into stereo  
fields.
However, I did not find any hints in the cap_dc1394_v2.cpp on why this  
"stereo-decoding" might happen.

This seems to be a regression from 2.0 (in Testing). Using the same C and  
Python programs gets me a good image with OpenCV 2.0.
It does not seem to be a problem with libdc1394 as I used the same library  
version when comparing OpenCV 2.0 and 2.1.

Any hints?



-- System Information:
Debian Release: squeeze/sid
   APT prefers testing
   APT policy: (990, 'testing'), (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages libhighgui2.1 depends on:
ii  libatk1.0-0             1.30.0-1         The ATK accessibility toolkit
ii  libatlas3gf-base [libla 3.6.0-24         Automatically Tuned Linear  
Algebra
ii  libavcodec52            4:0.5.2-1        ffmpeg codec library
ii  libavformat52           4:0.5.2-1        ffmpeg file format library
ii  libavutil49             4:0.5.2-1        ffmpeg utility library
ii  libbz2-1.0              1.0.5-4          high-quality block-sorting  
file co
ii  libc6                   2.11.2-2         Embedded GNU C Library:  
Shared lib
ii  libcairo2               1.8.10-4         The Cairo 2D vector graphics  
libra
ii  libcv2.1                2.1.0-2          computer vision library
ii  libdc1394-22            2.1.2-3          high level programming  
interface f
ii  libfontconfig1          2.8.0-2.1        generic font configuration  
library
ii  libfreetype6            2.4.2-1          FreeType 2 font engine,  
shared lib
ii  libgcc1                 1:4.4.4-8        GCC support library
ii  libglib2.0-0            2.24.1-1         The GLib library of C routines
ii  libgtk2.0-0             2.20.1-1         The GTK+ graphical user  
interface
ii  libjasper1              1.900.1-7        The JasPer JPEG-2000 runtime  
libra
ii  libjpeg62               6b1-1            The Independent JPEG Group's  
JPEG
ii  liblapack3gf [liblapack 3.2.1-8          library of linear algebra  
routines
ii  libpango1.0-0           1.28.1-1         Layout and rendering of  
internatio
ii  libpng12-0              1.2.44-1         PNG library - runtime
ii  libstdc++6              4.4.4-8          The GNU Standard C++ Library  
v3
ii  libswscale0             4:0.5.2-1        ffmpeg video scaling library
ii  libtiff4                3.9.4-2          Tag Image File Format (TIFF)  
libra
ii  zlib1g                  1:1.2.3.4.dfsg-3 compression library - runtime

libhighgui2.1 recommends no packages.

libhighgui2.1 suggests no packages.



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