[ros-users] Camera_calibration Error: Stereo calibration

[Adam Stambler]

Hi,

I am working with the stereo calibrator.  I am trying to calibrate a stereo
rig with two logitech webcams whose images are  320 by 240.  The camera
drivers are based off of modified v4l2stereo code.  Is it possible that we
introduced this kind of error with an incorrectly written image publisher?

Thank you again for the help,
Adam

On Sun, Apr 25, 2010 at 6:57 PM, James Bowman <jamesb at willowgarage.com>wrote:

> Hi Adam,
>
> Is this the monocular or stereo calibrator?
> And what size image /camera is this working with?
>
> On Sun, Apr 25, 2010 at 2:50 PM, Adam Stambler <adasta at gmail.com> wrote:
>
>> Hello Folks,
>>
>> I am using boxturtle to do stereo calibration.  I have been running the
>> cameracalibrator.py node with no trouble up until the point where it needs
>> to calibrate.  When I hit the green calibrate button, and it outputs this
>> error message:
>>
>> epipolar error: 0.740361764685
>> OpenCV Error: Assertion failed (src.type() == dst.type() && dst.size() ==
>> mapx.size()) in cvRemap, file
>> /home/asher/ros/stacks/vision_opencv/opencv2/build/opencv-svn/src/cv/cvimgwarp.cpp,
>> line 3083
>> Exception in thread Thread-9:
>> Traceback (most recent call last):
>>   File "/usr/lib/python2.6/threading.py", line 525, in __bootstrap_inner
>>     self.run()
>>   File "./cameracalibrator.py", line 59, in run
>>     self.function(m)
>>   File "./cameracalibrator.py", line 233, in handle_stereo
>>     lscrib = self.c.lremap(lrgb)
>>   File
>> "/home/asher/ros/stacks/image_pipeline/camera_calibration/src/camera_calibration/calibrator.py",
>> line 407, in lremap
>>     cv.Remap(src, r, self.lmapx, self.lmapy)
>> error: src.type() == dst.type() && dst.size() == mapx.size()
>>
>> I am a bit flummoxed by the error as the arguments to lremap all seem to
>> be OK.  Is there some way I could be making a mistake in setting up the
>> calibrator?
>>
>> Have other people had this problem with the current revision of
>> boxturtle?
>>
>> Thank you for the help and guidance,
>> Adam Stambler
>>
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>>
>>
>
>
> --
> J.
>
>
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