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Determine object world coordinate by two or few cameras

asked 2013-05-06 13:59:01 -0500

Victor1234 gravatar image

I calibrated two cameras and i know it extrinsic parameters, how i can determine world coordinate of object by two frame from them?

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answered 2013-05-07 03:03:05 -0500

Look at the stereo-vision methods (Google it) or the OpenCV implementation StereoBM or StereoSGBM. You also could look at the samples: cpp/stereo_match.cpp or python2/ or gpu/stereo_match.cpp or gpu/stereo_multi.cpp in the OpenCV trunk.

If you have more than two camera, epipolar geometry can be hard to understand... You could look at the Shape From Silhouettes (the principles) and a lot of details here. It allows you to reconstruct a 3D object from multiple views, which could be a solution for you to find the 3D coordinate.

Otherwise, almost in the same way, you could look at Space Carving which used photometric consistency for objects reconstruction.

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Asked: 2013-05-06 13:59:01 -0500

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Last updated: May 07 '13