Snapshot high dynamic range imaging based on adjustable attenuation microarray mask

Shuwei Yang; XinYu Ma; Yu Ning; Quan Sun; Wenjing Zhang; Yu Cao

doi:10.1117/12.3013637

30 April 2024 Snapshot high dynamic range imaging based on adjustable attenuation microarray mask

Shuwei Yang, XinYu Ma, Yu Ning, Quan Sun, Wenjing Zhang, Yu Cao

Proceedings Volume 13153, Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Technologies in Optical Systems; 1315307 (2024) https://doi.org/10.1117/12.3013637
Event: Sixth Conference on Frontiers in Optical Imaging Technology and Applications (FOI2023), 2023, Nanjing, JS, China

Abstract

High Dynamic Range Imaging Based on Attenuation Microarray Mask has broad application prospects due to its good real-time performance and small size. But at the current level of craftsmanship, it is hard to fabricate a microattenuation array mask whose attenuation rate is adjustable. This leads to the fact that the imaging dynamic range cannot adapt to changes in scene brightness in most cases. To this end, this paper proposes a novel imaging system whose dynamic range can adaptively change according to the brightness of the scene. The core components are the micro polarization array mask mounted on the CMOS surface and the on-sensor rotatable linear polarizer in front of the lens. By controlling the rotation angle of the polarizer placed before the lens, the CMOS pixel exposure can be precisely controlled. Therefore, the imaging system dynamic range can be adjusted adaptively according to the scene brightness. Through horizontal comparison with Sony’s multi-quadrant polarization chip, we determined the optimal parameters of the multi-quadrant micro-polarization array mask for extending the dynamic range. The experimental results show that the imaging performance remains consistently good even when the dynamic range of the photographed scene is large, and the dynamic range of the device can be adapted to the dynamic range of the shooting scene, so that the image after shooting and processing can always show sufficient details. By rotating the polarizer in front of the lens to a specific angle, the high dynamic imaging of the scene can be significantly improved.

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

Citation Download Citation

Shuwei Yang, XinYu Ma, Yu Ning, Quan Sun, Wenjing Zhang, and Yu Cao "Snapshot high dynamic range imaging based on adjustable attenuation microarray mask", Proc. SPIE 13153, Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Technologies in Optical Systems, 1315307 (30 April 2024); https://doi.org/10.1117/12.3013637

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KEYWORDS

Polarizers

Image fusion

Polarization

High dynamic range imaging

Cameras

Imaging systems

Attenuation

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