Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Simultaneous Estimation of Spatial Frequency and Phase Based on an Improved Component Cross-Correlation Algorithm for Structured Illumination Microscopy

  • Zhang, Yinxin (Key Laboratory of Opto-electronics Information Technology, Ministry of Education, Tianjin University) ;
  • Deng, Jiajun (Key Laboratory of Opto-electronics Information Technology, Ministry of Education, Tianjin University) ;
  • Liu, Guoxuan (State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University) ;
  • Fei, Jianyang (Key Laboratory of Opto-electronics Information Technology, Ministry of Education, Tianjin University) ;
  • Yang, Huaidong (State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University)
  • Received : 2020.01.03
  • Accepted : 2020.06.09
  • Published : 2020.08.25
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Abstract

Accurate estimation of spatial frequencies and phases for illumination patterns are essential to reconstructing super-resolution images in structured illumination microscopy (SIM). In this manuscript, we propose the improved component cross-correlation (ICC) algorithm, which is based on optimization of the cross-correlation values of the overlapping information between various spectral components. Compared to other algorithms for spatial-frequency and phase determination, the results calculated by the ICC algorithm are more accurate when the modulation depths of the illumination patterns are low. Moreover, the ICC algorithm is able to calculate the spatial frequencies and phases simultaneously. Simulation results indicate that even if the modulation depth is lower than 0.1, the ICC algorithm still estimates the parameters precisely; the images reconstructed by the ICC algorithm are much clearer than those reconstructed by other algorithms. In experiments, our home-built SIM system was used to image bovine pulmonary artery endothelial (BPAE) cells. Drawing support from the ICC algorithm, super-resolution images were reconstructed without artifacts.

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References

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