Event-based asynchronous HDR imaging by temporal incident light modulation

Dynamic range (DR) is a pivotal characteristic of imaging systems. Current framebased 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 the standard test platform and several challenging scenes have verified the feasibility of the system in HDR imaging tasks.