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arXiv · 1906.10045

A closed-loop all-electronic pixel-wise adaptive imaging system for high dynamic range video

Jie·Zhang·Jonathan P. Newman·Xiao Wang·Chetan Singh Thakur·John Rattray·Ralph Etienne-Cummings·Matthew A. Wilson
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Abstract

We demonstrated a CMOS imaging system that adapts each pixel's exposure and sampling rate to capture high dynamic range (HDR) videos. The system consist of a custom designed image sensor with pixel-wise exposure configurability and a real-time pixel exposure controller. These parts operate in a closed-loop to sample, detect and optimize each pixel's exposure and sampling rate to minimize local region's underexposure, overexposure and motion blurring. Exposure control is implemented using all-integrated electronics without external optical modulation. This reduces overall system size and power consumption. The image sensor is implemented using a standard 130nm CMOS process while the exposure controller is implemented on a computer. We performed experiments under complex lighting and motion condition to test performance of the system, and demonstrate the benefit of pixel-wise adaptive imaging on the performance of computer vision tasks such as segmentation, motion estimation and object recognition.

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Jie, Zhang, Jonathan P. Newman, Xiao Wang, Chetan Singh Thakur, John Rattray, Ralph Etienne-Cummings, Matthew A. Wilson. 2019-06-24. A closed-loop all-electronic pixel-wise adaptive imaging system for high dynamic range video. https://arxiv.org/abs/1906.10045

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