New amplitude weighted filtering technique for noise reduction in images with 2π phase jumps

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This paper presents an interesting algorithm, suitable for substantial noise reduction in images with 2(pi) phase jumps. It first applies a cosine transform to the phase map associated with the corresponding fringe pattern then filters (low pass) the resulting images and computes phase again from both images. Since the cosine transform is invariant to a 2(pi) phase jumps the low pass filtering does not distort the measuring signal in such regions.