14 May 2018 Adaptive weighted total variation regularized phase retrieval in differential phase-contrast imaging
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Abstract
Phase retrieval with unidirectional differential phase-contrast image requires integration with noisy data, which is an illposed inverse problem. Conventional direct integration method would result in severe streak artifacts. Total variation (TV) regularization-based method would reduce the streak artifacts, but the edges parallel with phase-contrast sensitivity direction are likely to be over smoothed. We propose an improved weighted TV regularization phase retrieval method by introducing a weighting factor to the conventional TV term. When applied to simulation and experimental data, this method shows an advantage of preserving the sharpness of the edges while preserving the ability of reducing streak artifacts compared with conventional TV-regularization method.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Yan Wang, Wanxia Huang, Qili He, Zhongzhu Zhu, Jin Zhang, Qingxi Yuan, Kai Zhang, Peiping Zhu, "Adaptive weighted total variation regularized phase retrieval in differential phase-contrast imaging," Optical Engineering 57(5), 053108 (14 May 2018). https://doi.org/10.1117/1.OE.57.5.053108 Submission: Received 8 February 2018; Accepted 27 April 2018
Submission: Received 8 February 2018; Accepted 27 April 2018
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