In this paper, we propose a novel post-alignment method. The method is both simple and effective for stereo video postproduction.
A low-distortion algorithm for rectifying the epipolar lines is first introduced. Unlike traditional methods,
which map the epipoles to (1,0,0) T directly, our method conducts it in two steps: 1) mapping the epipoles to points at
infinity; 2) aligning the epipolar lines with x-axis. More specifically, by taking advantage of that commonly available
stereoscopic movies are nearly aligned, our method keeps one of the stereo images unchanged, and the rectification is
only applied to the other image. Besides epipolar non-parallel distortions, disparity distortion is also an important issue
to consider for the stereoscopic movie. We propose a new constraint for stereoscopic video alignment such that the
variations of disparities is also minimized. Experimental results have demonstrated that our method obtains better visual
effect than the state-of-the-art methods.