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- 2016
利用视差进行立体像对的建成区检测方法
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Abstract:
建成区的建筑物等地物通常高于周围地表,因此高度梯度在其边缘发生突变。从立体像对生成两幅核线影像及其对应的视差图,然后利用该规律由视差图生成立体像对视差指数(stereo pair disparity index,SPDI)图。对SPDI图的高值像素进行空间聚类,得到该视差图对应的核线影像中的建成区结果,并且该结果可投影定位于立体像对的原始影像。此外,对于立体像对的两幅影像中分别检测的不一致结果,由于视差图包含了同名点间的对应关系,因此利用视差图有利于对齐不一致结果。然后,对取交集可获得高可信度的、一致的建成区结果。最后,采用两组立体像对进行试验验证,结果表明该方法可从立体像对检测出高精度的建成区
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