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arXiv · 2403.09392

Event-based Asynchronous HDR Imaging by Temporal Incident Light Modulation

Yuliang Wu·Ganchao Tan·Jinze Chen·Wei Zhai·Yang Cao·Zheng-Jun Zha
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Abstract

Dynamic Range (DR) is a pivotal characteristic of imaging systems. Current frame-based cameras struggle to achieve high dynamic range imaging due to the conflict between globally uniform exposure and spatially variant scene illumination. In this paper, we propose AsynHDR, a Pixel-Asynchronous HDR imaging system, based on key insights into the challenges in HDR imaging and the unique event-generating mechanism of Dynamic Vision Sensors (DVS). Our proposed AsynHDR system integrates the DVS with a set of LCD panels. The LCD panels modulate the irradiance incident upon the DVS by altering their transparency, thereby triggering the pixel-independent event streams. The HDR image is subsequently decoded from the event streams through our temporal-weighted algorithm. Experiments under standard test platform and several challenging scenes have verified the feasibility of the system in HDR imaging task.

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Yuliang Wu, Ganchao Tan, Jinze Chen, Wei Zhai, Yang Cao, Zheng-Jun Zha. 2024-03-14. Event-based Asynchronous HDR Imaging by Temporal Incident Light Modulation. https://arxiv.org/abs/2403.09392

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