[ros-users] camera_calibration

[Eric Perko]

Patrick,

So I did give this a shot, but ran into some issues with my camera
nodes not being in sync. Until I write a synchronization node, I doubt
I will get much farther with stereo calibration. If you post the your
changes to approximate the synchronization, I could see about applying
those and giving that a shot when I get another chance to work on
stereo calibration.

- Eric

On Tue, Apr 6, 2010 at 6:10 PM, Patrick Beeson <beeson.p at gmail.com> wrote:
> Data is at http://daneel.traclabs.com/~pbeeson/calibrationdata.tar.gz
>
> Patrick Mihelich wrote:
>> On Tue, Apr 6, 2010 at 2:01 PM, Patrick Beeson <beeson.p at gmail.com
>> <mailto:beeson.p at gmail.com>> wrote:
>>
>>     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.
>>
>>
>> Yes, can you send me the output tar.gz file or post it online somewhere?
>>
>> The projection matrix describes projection into rectified image
>> coordinates, where the rotation matrices have already been applied to
>> make the left and right images aligned with each other. In those
>> idealized coordinates, the baseline is purely horizontal, so you
>> shouldn't see any vertical offset in the projection matrices.
>>
>> - Patrick
>>
>>
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