An optimization approach to transport-of-intensity equation for high resolution quantitative phase imaging

Shubham Tiwari; Himanshu Joshi; Sunil Bhatt; Harpreet Kaur; Shivam Trivedi; Dalip Singh Mehta

doi:10.1117/12.3008517

12 March 2024 An optimization approach to transport-of-intensity equation for high resolution quantitative phase imaging

Shubham Tiwari, Himanshu Joshi, Sunil Bhatt, Harpreet Kaur, Shivam Trivedi, Dalip Singh Mehta

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Proceedings Volume 12852, Quantitative Phase Imaging X; 128520O (2024) https://doi.org/10.1117/12.3008517
Event: SPIE BiOS, 2024, San Francisco, California, United States

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Abstract

Quantitative phase measurements in a Transport of intensity equation(TIE) based method requires capturing images at multiple defocussed positions. Using these intensity measurements along with the phase obtained we demonstrate an optimization algorithm that improves the quantitative phase estimation recovering the fine details that may be lost due to diffraction effects, aberrations and limitations of the TIE based method. We implement a cost minimization scheme to minimize the difference between measured and theoretically expected amplitude to improve the estimate of the required object field. Application of the method shows an improved accuracy in phase estimation of simulated and real objects.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Shubham Tiwari, Himanshu Joshi, Sunil Bhatt, Harpreet Kaur, Shivam Trivedi, and Dalip Singh Mehta "An optimization approach to transport-of-intensity equation for high resolution quantitative phase imaging", Proc. SPIE 12852, Quantitative Phase Imaging X, 128520O (12 March 2024); https://doi.org/10.1117/12.3008517

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