区域划分与视差估计结合的控制点立体匹配方法

Stereo matching of control point based on region division and disparity estimation

针对控制点立体匹配的速度与准确性问题,提出了一种区域划分与视差估计结合的控制点立体匹配方法。该方法采用立体校正的方法对左、右图像进行立体校正,使得左、右图像上的对应控制点处于图像的同一行上,大大减少了立体匹配的搜索范围;采用迭代拟合的方法精确定位控制点的圆心;利用投影编码图案对测量视场范围进行划分,通过视差估计的约束减少所需投影图像数目。实验结果表明,该方法无需编码控制点,只需3张编码图案即可快速、准确地完成控制点的立体匹配,并具有很强的可变性以满足实际需求。

To resolve the problem of low speed and veracity of the control point stereo matching, a method based on the combina- tion of region division and disparity estimation was put forward. First, the left and right images are rectified, so the matching points would locate at the same image row and the search range of stereo matching was reduced dramatically. The center of control point can be located by iterative fitting method precisely. The measuring field was divided by projection coding image, through the dis- parity estimation constraints to reduce the required number of projection images. The measuring experiment results indicated that this method can complete the control points stereo matching quickly and exactly without coded control points, it only needs three images and has strong flexibility.