Re: [ros-users] camera_calibration

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Author: Patrick Beeson
Date:  
To: ros-users
Subject: Re: [ros-users] camera_calibration
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 <>
>> 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.
>>>
>>> _______________________________________________
>>> ros-users mailing list
>>>
>>> https://code.ros.org/mailman/listinfo/ros-users
>>>
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