Stereo matching in 3D measurement system using double CCD structured light

The establishment of correspondence between two images is the precondition for 3D reconstruction in computer vision. By comparing several commonly used stereo matching methods, a highly effective stereo matching method, which is a combination of several matching methods, is proposed as a solution to the existing problem as detailed below: a series of gratings constructed by computer for phase demodulation is projected onto the object, and a series of black and white coded gratings constructed by computer is then projected onto the object, the distorted grating images are collected into the computer by CCD, the primary value of phase folded in zone is obtained through phase demodulation using the phase demodulation gratings, the period of phase is obtained through phase demodulation using structured light coding proposed, the true phase value is obtained by adding the two, the points with the same phase are fitted into a continuous cure by interpolation to realize the matching between two CCD images with the same curves, and the matching between the corresponding points in two images is obtained according to the epipolar constraint conditions. Experimental results proved the correctness and effectiveness of the method proposed.