[ros-users] camera_calibration

[Patrick Beeson]

Sorry, I just checked and I am actually using the trunk, not latest. 
The problem is that I'm getting large rotational values, and I'm only 
ever seeing a horizontal offset in T (top right value in projection 
matrix) as non-zero, even though the cameras are at slightly different 
heights.  I can send the saved tar.gz file that contains the images used 
and the ost.txt created if it helps.

Patrick Beeson wrote:
> I checked out latest and had to do a small bit of changes to sync the 
> timestamps of the two cameras whenever frames have very close 
> timestamps.  So they aren't EXACTLY synced, but VERY closely synced.  I 
> can try to send you a screen shot of the output.  Note, I am testing 
> this with a quite small checkerboard (your checkerboard, but with 26mm 
> squares).  Maybe that's the problem?  Maybe I'm sampling a space too 
> close to the cameras?
> 
> Eric Perko wrote:
>> Patrick,
>>
>> What version of camera_calibration are you using? Boxturtle?
>>
>> - Eric
>>
>> On Tue, Apr 6, 2010 at 4:31 PM, Patrick Beeson <beeson.p at gmail.com> 
>> wrote:
>>> I'm trying to calibrate two identical 1394 cameras that are sitting next
>>> to each other.  The stereo calibration from camera_calibration converges
>>> to VERY bad R and T matrices, rotating the frames and
>>> the warping the images drastically.  I've tried several times, with 
>>> no luck.
>>>
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