EXPERIMENTS WITH MATCHING IN THE OBJECT SPACE FOR AEROTRIANGULATION

A method for accurate and reliable image matching for aerotriangulatio n is described and experimental results are reported. Most matching me thods use small image patches because they assume that the object surf ace around the point is planar. However, in order to increase reliabil ity, large image patches that are more likely to contain significant i nformation are necessary. In the method presented here, the matching i s performed in the object space in order to minimize the geometric dis tortion of the image patches due to the relief. As a result, much larg er image patches can be used, which increases both the accuracy and th e reliability. Experimental results obtained from six different datase ts confirm these expectations. The accuracy varies between 1/5 and 1/1 2 of a pixel.