立体图像对的极线校正

Epipolar line rectification for stereo pairs

将Seitz方法和Francesco方法结合起来,给出了一种改进的极线校正方法。该方法利用改进的八点算法算出基本矩阵,根据基本矩阵采用Seitz方法计算投影变换矩阵,最后以算出的投影变换矩阵为初值采用Francesco方法对其进行最优化,从而有效地避免了最优化时陷入局部最优的可能,同时又不过分依赖基本矩阵的精度。通过对Francesco方法、Mallon方法和该方法进行对比实验,可以发现该方法具有更高的校正精度,图像的扭曲也比较小。

Combining Seitz method with Francesco method, a improved method to rectify epipolar lines for stereo pairs is introduced. In this method, the fundamental matrix is calculated using the improved eight-point algorithm and then as an input for Seitz method to get the projective transformation matrices. Finally, these matrices are used to initialize the Francesco method for optimization, avoiding in this way local minima as well as the dependence on the precision of the fundamental matrix. Experimental results show that the presented method works more accurately with low image distortion in contrast to Francesco method and Mallon method.