How can i improve stereo calibration accuracy?

Question

I want to calibrate stereo camera in c#(in Emgu library). but the calibration accuracy is very badthis is an example of disparity map!Please help me. Thank you

Answer 1

As you can see in the picture, the two corner positions are not aligned vertically in the right and left images (red lines). Thus the stereo matching would fail. (Your disparity image is not noisy - it is just invalid.)

I think there is a problem producing the rectified images but I have no clue unless you provide more information on how you made the images.

Answer 2

Normally, the stereo vision algorithm must be able to delete this misalignment. In the attached file 1, rectification images are shown. It seems the rectified images are good, but disparity map is very bad. What is your idea? Thank you