Abstract： The traditional stereo correction method based on epipolar geometry is difficult to apply to the binocular imaging and display system with optical axes divergent arrangement for wide field of view. To address this problem, using 3D reconstruction error, a stereo image correction method was proposed based on the disparity characteristics of the binocular images. First, the features of horizontal and vertical disparity of the images captured by binocular imaging system with divergent optical axes was analyzed. Then, based on these characteristics, a pair of affine transformation was proposed for the position error between the optical centers of the binocular cameras and the corresponding projection centers of the wide vision HMD(Head Mounted Display), and two functions of horizontal disparity distortion correction and vertical disparity correction were proposed for the angular deviation between the optical axes of binocular cameras and the corresponding visual axes of the wide vision HMD. Finally, the stereo correction parameters were calculated using the optimization solution with 3D reprojection errors of a set of 3D spatial points. Simulation results show that this method can effectively eliminate the effects on the stereo disparity of the binocular images caused by the position error of optical center and the angular deviation of optical axes when the divergent angle of visual axes is up to 30 °. Real image correction experiment results show that the corrected images have small horizontal distortion, and can provide correct 3D senses with a wide field of view.
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