MATLAB: Stereo Calibration and Image Rectification

camera-calibrationcomputer visionComputer Vision Toolboxstereo imaging

I'm trying to use the stereo camera calibrator to rectify a pair of stereo images. However, while the reprojection errors, extrinsic view, and reprojected points all look reasonable, the "show rectified" button just returns horizontal lines of various colors.
Similarly, attempting to use
[J1, J2] = rectifyStereoImages(I1, I2, stereoParams);
to rectify the stereo images returns a blank image:
Turning on 'OutputView' ,'full' :
% Rectify the images.
[J1, J2] = rectifyStereoImages(I1, I2, stereoParams, 'OutputView' ,'full');
shows the rectification is inverted:
I've attached my calibration images if they are of use. Thanks in advance for any help!

Best Answer

Hi John,
You should check a couple of things. First, it looks like your checkerboard is a very short distance away from the cameras. In this case you do not need a wide baseline, so see if you can move the cameras closer together. Second, make sure that camera 1 is to the left of camera 2, as you face in the same direction as the cameras. This is not strictly necessary, but it makes things easier. Otherwise your disparity will be negative.
Once you get past this problem, see this answer, if you run into more issues.
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