Checking consistency between drawings based on image invariant moments in wavelet domain
基于小波域图像不变矩的图纸一致性检测

Checking consistency between the scanned drawing and the electronic drawing is required in the flow of electronic declaring. The approach of checking consistency between drawings in drawings audit system based on wavelet transform and image invariant moments was presented for solving this problem. Firstly, the scanned drawings were processed by affine transform in order to achieve image registration. Secondly, the scanned drawing and the electronic drawing were decomposed by wavelet transform, which could reduce the complexity of the computation. Finally, checking consistency between drawings could be completed using the traits of invariant moments, such as shift, rotation and scale invariant. The experimental results show that the proposed algorithm can well check the consistency between drawings.