Temporal phase unwrapping (TPU) has important application in fringe projection phase-shifting profilometry to measure multi-isolate objects and discontinuities surfaces. Due to the gray-scale standard of the digital projector. the gray-scale of the deformed pattern is of 256 at most. Suppose the frequency of the high-frequency patterns is enlarged for improving accuracy. https://cosmeticssquadets.shop/product-category/eyelashes/