Rapid phase recovery from through-focus intensity measured by event cameras

Tingyu Zhang; Jingshan Zhong; Dihong Tian

doi:10.1117/12.2608099

2 March 2022 Rapid phase recovery from through-focus intensity measured by event cameras

Tingyu Zhang, Jingshan Zhong, Dihong Tian

Proceedings Volume 11970, Quantitative Phase Imaging VIII; 1197009 (2022) https://doi.org/10.1117/12.2608099
Event: SPIE BiOS, 2022, San Francisco, California, United States

Abstract

High speed phase recovery from through-focus intensity images remains challenging. The limitation lies in the accumulated exposure time of intensity measurement. In this work, we propose to recover phase from the measurement of an event camera. Event cameras asynchronously measure intensity changes at microsecond resolution. It enables capturing the through-focus intensity changes with high speed. We build the forward model of the imaging process, which incorporates the temporal noise of event camera. We develop nonlinear optimization algorithms to solve phase from measured events. We validate the algorithms with simulations and test the effects of sensitivity parameters and temporal noise.

Conference Presentation

Citation Download Citation

Tingyu Zhang, Jingshan Zhong, and Dihong Tian "Rapid phase recovery from through-focus intensity measured by event cameras", Proc. SPIE 11970, Quantitative Phase Imaging VIII, 1197009 (2 March 2022); https://doi.org/10.1117/12.2608099

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