Event-based Asynchronous HDR Imaging by Temporal Incident Light Modulation
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866929276408823808 |
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| author | Wu, Yuliang Tan, Ganchao Chen, Jinze Zhai, Wei Cao, Yang Zha, Zheng-Jun |
| author_facet | Wu, Yuliang Tan, Ganchao Chen, Jinze Zhai, Wei Cao, Yang Zha, Zheng-Jun |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_09392 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Event-based Asynchronous HDR Imaging by Temporal Incident Light Modulation Wu, Yuliang Tan, Ganchao Chen, Jinze Zhai, Wei Cao, Yang Zha, Zheng-Jun Image and Video Processing Computer Vision and Pattern Recognition 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. |
| title | Event-based Asynchronous HDR Imaging by Temporal Incident Light Modulation |
| topic | Image and Video Processing Computer Vision and Pattern Recognition |
| url | https://arxiv.org/abs/2403.09392 |