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The extraction of buildings on the basis of the prior shape

In the existing various kinds of active contour model methods about image segmentation, level set method has been widely used because of its powerful capabilities of topological transformation. Because of the global computation, level set has accurate shape description effect. On the other hand, it makes the segmentation result sensitive to noise. In this paper, we propose a simple modified method to extract the target embedding prior shape in the algorithm. It takes a prior shape for a kind of standard building and integrates the model constraint to the image constraint. The parameters of the model are evaluated by generic algorithm. The experimental results prove the effectiveness of our model.