直接检测平顶房屋影像遮蔽的协同匹配算法

提出了一种检测平顶房屋影像遮蔽现象的匹配地。为了提取密集视差格网，本算法采有了Marr和Poggio提出的影像匹配的唯一性和连续性的条件，即视差格网应有唯一的值并且在各处连续变化，这些约束在表示视差空间的3维数组中表示出发，在表示视差空间的3维数组中的每个匹配值对应左图像中的一个像素和与另一影像相对应的视差值。用迭代算法解决匹配的寻优问题。应用唯一性和连续性约束，直接检测影像遮蔽区域，为了验证该算法的有效性，用航片进行了实验。

A Stereo Algorithm for Obtaining disparity Maps of Flat Roof Buildings with Occlusion Explicitly Detected

This paper presents a stereo algorithm for obtaining disparity maps of flat roof buildings with occlusion explicitly detected. To produce smooth and detailed disparity maps, two assumptions that were originally proposed by Marr and Poggio are adopted: uniqueness and continuity. These assumptions are enforced within a three dimensional array of match values in disparity space. Each match value corresponds to a pixel in an image and a disparity relative to another image. An iterative algorithm updates the match values by diffusing support among neighboring values and inhibiting others along similar lines of sight. By applying the uniqueness assumption, occluded regions can be explicitly identified. To test the effectiveness of the algorithm, we apply it in obtaining DEM from real aerial image pairs.