Abstract
This paper treats an improvement of stereo plotting from small or middle scale aerial photographs. The method proposed is based on Panton's one, in which a typical area matching scheme is used for practical utility. But the authors' experiment shows Panton's method does not function well because of the following contradictory neck; A small window is required for precise matching and simultaneously a large window is required for stable matching to prevent wandering of search. To solve this problem this paper proposes a multi-stage matching procedure from coarse matching using large correlation windows to fine matching using small windows. Perspective distortions due to terrain relief, which deteriorate correlation, are eliminated by changing the form of search windows in accordance with measured χ-parallaxes.
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