Event-based Asynchronous HDR Imaging by Temporal Incident Light
  Modulation
Yuliang Wu Ganchao Tan Jinze Chen Wei Zhai Yang Cao Zheng-Jun Zha
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.