This paper demonstrates a method for the extraction of building walls with the object-space matching by using independent rectification images of aerial photograph. In order to solve problems of wall extraction, we proposed 2 matching methods and evaluated with the experiments in this paper. Multiple edge matching method extracts roof outlines from complicated images. In addition, wall matching method searches the accurate wall position from candidates of roof outlines. In the experimental

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... ts, first, multiple-images edge matching has obtained candidate of roof outlines in sufficient accuracy for initial value of wall matching method.Second,in the case of existing gap between roof outlines and actual wall position,the wall position has been measured automatically in accurate position with wall matching.In general,image matching on building wall using aerial photographs is difficult. However, proposed method can solve this problem by using searching in the object space with the independent rectification images. And then, building wall or not can be judged with characteristic of correlation coefficient in image matching. Finally, this method contributes to measure accurate building wall position.