Diffractive processors enable all-optical image denoising

Cagatay Isil; Tianyi Gan; Fazil Onuralp Ardic; Koray Mentesoglu; Jagrit Digani; Huseyin Karaca; Hanlong Chen; Jingxi Li; Deniz Mengu; Mona Jarrahi; Kaan Aksit; Aydogan Ozcan

doi:10.1117/12.3027789

4 October 2024 Diffractive processors enable all-optical image denoising

Cagatay Isil, Tianyi Gan, Fazil Onuralp Ardic, Koray Mentesoglu, Jagrit Digani, Huseyin Karaca, Hanlong Chen, Jingxi Li, Deniz Mengu, Mona Jarrahi, Kaan Aksit, Aydogan Ozcan

Author Affiliations +

Proceedings Volume PC13118, Emerging Topics in Artificial Intelligence (ETAI) 2024; PC131180T (2024) https://doi.org/10.1117/12.3027789
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Abstract

We present an all-optical image denoiser based on spatially-engineered diffractive layers. Following a one-time training process using a computer, this analog processor composed of fabricated passive layers achieves real-time image denoising by processing input images at the speed of light and synthesizing the denoised results within its output field-of-view, completely bypassing digital processing. Remarkably, these designs achieve high output diffraction efficiencies of up to 40%, while maintaining excellent denoising performance. The effectiveness of this diffractive image denoiser was experimentally validated at the terahertz spectrum, successfully removing salt-only noise from intensity images using a 3D-fabricated denoiser that axially spans <250 wavelengths.

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Cagatay Isil, Tianyi Gan, Fazil Onuralp Ardic, Koray Mentesoglu, Jagrit Digani, Huseyin Karaca, Hanlong Chen, Jingxi Li, Deniz Mengu, Mona Jarrahi, Kaan Aksit, and Aydogan Ozcan "Diffractive processors enable all-optical image denoising", Proc. SPIE PC13118, Emerging Topics in Artificial Intelligence (ETAI) 2024, PC131180T (4 October 2024); https://doi.org/10.1117/12.3027789

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KEYWORDS

Image processing

Image denoising

Digital image processing

Digital Light Processing

Analog electronics

Denoising

Light sources and illumination

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