Directly denoising-free for phase unwrapping algorithm of gray-scale electronic speckle interferometry fringe pattern

We describe a satisfied method for phase unwrapping algorithm of gray-scale electronic speckle interferometry fringe patter without de-noising. Our method is based on optimal the energy of wrapped graph. We propose a discrete method construct a global graph with sub-graphs. Then, the min-energy is calculated using iterate algorithm with max-flow theory. The phase was unwrapped with min-energy condition. The proposed method works directly de-noising-free for phase unwrapping which is desired for phase shifting measurement technology.