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arXiv · 1903.09036

Megapixel Photon-Counting Color Imaging using Quanta Image Sensor

Abhiram Gnanasambandam·Omar Elgendy·Jiaju Ma·and Stanley H. Chan
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Abstract

Quanta Image Sensor (QIS) is a single-photon detector designed for extremely low light imaging conditions. Majority of the existing QIS prototypes are monochrome based on single-photon avalanche diodes (SPAD). Passive color imaging has not been demonstrated with single-photon detectors due to the intrinsic difficulty of shrinking the pixel size and increasing the spatial resolution while maintaining acceptable intra-pixel cross-talk. In this paper, we present image reconstruction of the first color QIS with a resolution of $1024 \times 1024$ pixels, supporting both single-bit and multi-bit photon counting capability. Our color image reconstruction is enabled by a customized joint demosaicing-denoising algorithm, leveraging truncated Poisson statistics and variance stabilizing transforms. Experimental results of the new sensor and algorithm demonstrate superior color imaging performance for very low-light conditions with a mean exposure of as low as a few photons per pixel in both real and simulated images.

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Abhiram Gnanasambandam, Omar Elgendy, Jiaju Ma, and Stanley H. Chan. 2019-05-20. Megapixel Photon-Counting Color Imaging using Quanta Image Sensor. https://doi.org/10.1364/oe.27.017298

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