Hello, Andrew.<br>Thanks for the information, really helpful. <br>Does anybody have any experience on using the n8x0's camera from opencv?<br><br>Bad news come from maemo's How to use the Camera API
:<br>"<i>Since the maemo Platform delegates all multimedia handling to the GStreamer framework, applications
that need access to the built-in camera should employ GStreamer for this instead of directly
acessing Video4Linux devices, via the v4l2src GStreamer module.</i>"
<p>My attempts involved:<br></p><p>CvCapture * cap;<br>...<br>cap= cvCaptureFromCAM (-1);<br></p>and I get:<br>HIGHGUI ERROR: V4L: device /dev/video0: Unable to query number of channels<br><br>BTW, a very interesting tutorial, albeit in spanish, may be found at "<span class="a"><a href="http://dis.um.es/~ginesgm/files/doc/pav/guion3.pdf">http://dis.um.es/~ginesgm/files/doc/pav/guion3.pdf</a></span>"<br>
<br>Thank you,<br><br>Jesus A. Baro<br>Universidad de Valladolid<br><br><div class="gmail_quote">On Fri, Apr 11, 2008 at 8:33 PM, Andrew Daviel <<a href="mailto:advax@triumf.ca">advax@triumf.ca</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="Ih2E3d">On Sun, 6 Apr 2008, Jesus A. Baro wrote:<br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Hy Andrew,<br>
It just may be that fun with char arithmetics is not at the root of the<br>
trouble.<br>
Opencv compiles ok for me under both arm and x86. The trick came form ArnimS<br>
at internettabletalk: change -03 to -02.<br>
</blockquote>
<br></div>
I had to recompile cvpyrsegmentation with -O2; did that by hand and restarted make, but otherwise used -O3<br>
Also did export PYTHON=/usr/bin/python2.5 ; ./configure as I recall.<br>
I'm not using Python; just to get the build to run.<br>
<br>
I see it's trivial to make an image converter from e.g. JPEG to PNG with<br>
opencv, e.g.<br>
<a href="http://www.cs.iit.edu/%7Eagam/cs512/lect-notes/opencv-intro/opencv-intro.html" target="_blank">http://www.cs.iit.edu/~agam/cs512/lect-notes/opencv-intro/opencv-intro.html</a><br>
<br>
My real problem is that libdecodeqr I'm trying to use fails on 10% of codes for no obvious reason, and qrcode in jaimo is way too slow :-(<br><font color="#888888">
<br>
Andrew<br>
<br>
</font></blockquote></div><br>