[maemo-developers] opencv for arm WAS: signedness of char on ARM vs x86

[From: Andrew Daviel]

On Sun, 6 Apr 2008, Jesus A. Baro wrote:

> Hy Andrew,
> It just may be that fun with char arithmetics is not at the root of the
> trouble.
> Opencv compiles ok for me under both arm and x86. The trick came form ArnimS
> at internettabletalk: change -03 to -02.

I had to recompile cvpyrsegmentation with -O2; did that by hand and 
restarted make, but otherwise used -O3
Also did export PYTHON=/usr/bin/python2.5 ; ./configure as I recall.
I'm not using Python; just to get the build to run.

I see it's trivial to make an image converter from e.g. JPEG to PNG with
opencv, e.g.
http://www.cs.iit.edu/~agam/cs512/lect-notes/opencv-intro/opencv-intro.html

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 :-(

Andrew