Abstract
A modified nonlinear reconstruction technique with a noise modulation parameter is proposed for interferenceless coded aperture correlation holography (I-COACH), and thus the signal-to-noise ratio of a reconstructed image is improved without sacrifice of the field of view and temporal resolution of the system. In order to obtain the optimal reconstructed image, no-reference structural sharpness (NRSS) is introduced as the evaluation metric of reconstructed image quality during nonlinear reconstruction. On the other hand, the noise modulation function is built in order to analyze the effect of phase on noise when the amplitude of the point spread hologram and object hologram is unity of 1. Both the NRSS and noise modulation functions are combined with nonlinear reconstruction in I-COACH for improving imaging performance. The validities of the proposed method under different experimental conditions have been demonstrated by experiments.
Original language | English |
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Pages (from-to) | 1769-1774 |
Number of pages | 6 |
Journal | Applied Optics |
Volume | 59 |
Issue number | 6 |
DOIs | |
Publication status | Published - 20 Feb 2020 |
Funding
Funding. National Natural Science Foundation of China (61575009); Natural Science Foundation of Beijing Municipality (4182016); Beijing University of Technology (A13).
Funders | Funder number |
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National Natural Science Foundation of China | 61575009 |
National Natural Science Foundation of China | |
Beijing University of Technology | A13 |
Beijing University of Technology | |
Natural Science Foundation of Beijing Municipality | 4182016 |
Natural Science Foundation of Beijing Municipality |