US 12,130,129 B2
Phase unwrapping using segmentation
Rongguang Liang, Tucson, AZ (US); Junchao Zhang, Tucson, AZ (US); Xiaobo Tian, Tucson, AZ (US); and Jianbo Shao, Tucson, AZ (US)
Assigned to Arizona Board of Regents on Behalf of the University of Arizona, Tucson, AZ (US)
Appl. No. 17/294,635
Filed by Arizona Board of Regents on Behalf of the University of Arizona, Tucson, AZ (US)
PCT Filed Nov. 18, 2019, PCT No. PCT/US2019/062050
§ 371(c)(1), (2) Date May 17, 2021,
PCT Pub. No. WO2020/102814, PCT Pub. Date May 22, 2020.
Claims priority of provisional application 62/768,624, filed on Nov. 16, 2018.
Prior Publication US 2022/0011097 A1, Jan. 13, 2022
Int. Cl. G01B 11/30 (2006.01); G06V 10/25 (2022.01); G06V 10/26 (2022.01); G06V 10/30 (2022.01); G06V 10/75 (2022.01); G06V 10/88 (2022.01); G06V 10/94 (2022.01)
CPC G01B 11/303 (2013.01) [G06V 10/25 (2022.01); G06V 10/26 (2022.01); G06V 10/30 (2022.01); G06V 10/758 (2022.01); G06V 10/88 (2022.01); G06V 10/95 (2022.01)] 31 Claims
OG exemplary drawing
 
1. A method for processing interferograms or deformed fringes, comprising:
obtaining an input phase image based on the interferograms or the deformed fringes, wherein each pixel of the input phase image is associated with a phase value;
segmenting the input phase image by classifying the input phase image into multiple regions based on the phase value and a location of each pixel, wherein the multiple regions are determined by a neural network;
assigning an integer value to each of the multiple regions, wherein the integer value indicates that a corresponding region has a phase offset equal to a product of 2π and the integer value, wherein the integer value corresponding to each of the multiple regions is determined by the neural network; and
constructing an output phase image based on the phase value of each pixel and the phase offset of each of the multiple regions.