This work employs optical spatial filtering in transmission to increase the contrast of objects imaged with the Event-Based Sensor (EBS), improving object detectability. EBS are asynchronous imaging sensors with integrated change detection capabilities, able to detect spatio-temporal changes in scene brightness as they occur. This change detection capability is implemented in electronics, which while providing advantages such as low power and low latency, limits its ability to detect low-contrast objects. To address this shortcoming, the EBS may be augmented with improvements to its low-contrast sensitivity, using optical, coherent high-spatial frequency filtering (HPF). In this work, we present optical HPF to improve detection performance in EBS imaging systems. Experimental measurements demonstrate that objects containing features with contrasts as low as 3.53% are discernable, which enables object detection with triple the sensitivity of the standalone EBS.
Optical contrast amplification for enhancing event-based vision
Unconventional Imaging, Sensing, and Adaptive Optics 2023 ; 2023 ; San Diego, California, United States
Proc. SPIE ; 12693
2023-10-03
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Safe vision by contrast-enhancing spectacles
British Library Conference Proceedings | 2000
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