Opto-Electronic Engineering, Volume. 43, Issue 1, 36(2016)
A Region-growing Phase Unwrapping Algorithm Based on a New Quality-guided Map
For the measurement of five step phase shift optical interferometry, a new quality-guided map is proposed to be used in the region growing algorithm. Firstly, all the residues in the wrapped images are balanced based on the placement of the branch cuts. Then, the wrapped phase image is divided into some regions based on different quality values of the pixels, and the minimum quality value is assigned to pixels that belong to the branch cuts. The new quality-guided map is used to guide the region-growing unwrapping algorithm based on predictions from the highest quality values to the lowest. If the border area is overlapping, adjust the offset to merge. The proposed algorithm works fast and is robust against noise, as demonstrated in experimental and simulated data, compared with the traditional region-growing unwrapping algorithm based on predictions.
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LIU Ying, ZHANG Ruifeng, CHEN Xiangzhou, LI Qiang, JI Xin, WANG Yang. A Region-growing Phase Unwrapping Algorithm Based on a New Quality-guided Map[J]. Opto-Electronic Engineering, 2016, 43(1): 36
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Received: Apr. 30, 2015
Accepted: --
Published Online: Mar. 22, 2016
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