Performance enhancement of coherent modulation imaging in the presence of missing data

Liu，Tao1; Sun，Meng2; Zhang，Fucai1

2022-09-26

10.1364/OE.469038

Optics Express   Impact Factor & Quartile

1094-4087

1094-4087

Coherent diffraction imaging (CDI) has become a powerful imaging modality in synchrotron x-ray imaging and electron microscopy communities. In the far-field geometry, image quality of CDI depends strongly on the performance of detector; specifically, the dynamic range, pixel size, and the absence of missing data. Coherent modulation imaging (CMI), an innovative variant of CDI, improves the algorithmic convergence by inserting a modulator upstream of the detector. Here, we explore the potential of CMI in eliminating nonideal effects of detector by modifying the modulus constraint to extrapolate the missing part of diffraction pattern. Nine folds of extrapolation in area of diffraction pattern have been shown feasible in experiment; while sixteen folds in simulation. For image quality measured by Structural Similarity (SSIM), our method shows a maximum of 32% improvement over the traditional method. Our method provides a way to alleviate the effects of beamstop, gaps between modules, limited dynamic range, and limited detector size for CMI.

SCI

English

First ; Corresponding

National Natural Science Foundation of China["11775105","12074167"] ; Shenzhen Science and Technology Innovation Program[KQTD20170810110313773] ; SUSTech[6941806]

Optics

Optics

WOS:000870464100007

Optica Publishing Group

PHYSICS

2-s2.0-85138620710

Scopus

1.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,1088 Xueyuan Avenue,518055,China
2.Hebei Key Laboratory of Power Internet of Things Technology,Department of Electronic and Communication Engineering,North China Electric Power University,Baoding,071003,China

Liu，Tao,Sun，Meng,Zhang，Fucai. Performance enhancement of coherent modulation imaging in the presence of missing data[J]. Optics Express,2022,30(20):35951-35964.

Liu，Tao,Sun，Meng,&Zhang，Fucai.(2022).Performance enhancement of coherent modulation imaging in the presence of missing data.Optics Express,30(20),35951-35964.

Liu，Tao,et al."Performance enhancement of coherent modulation imaging in the presence of missing data".Optics Express 30.20(2022):35951-35964.