THE CONSTRUCTION OF ANTI-SYMMETRICAL WAVELET AND BUILDING EXTRACTION FROM REMOTE SENSING IMAGERY

摘要

The principal technical problem of 3D building semi-automatic acquisition from remote-sensing images was discussed by using wavelet analysis, combining digital photogrammetry and computer vision. A set of anti-symmetrical wavelet (ASWlet) functions and corresponding filters were deduced, e.g., multi-scales, symmetry, approximation compact support, good local regularity and smoothness. And it is a powerful tool to realize optimal edge detection. On the basis of the edge detection result, the improved chain code expression of image edge was used to describe the line feature. By using the linear template based on edge feature extraction and the binary image morphology we recognize the corners automatically. And then the anti-symmetric lifting wavelet algorithm to proceed the feature matching for getting the corresponding image points was proposed. Finally, via stereo intersection, we got the outline of 3D building from the stereo images.