@inproceedings{2781300f37de439f99a152b61cb63a60,
title = "Optical Contrast Amplification for Enhancing Event-Based Vision",
abstract = "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.",
keywords = "Contrast Sensitivity, Event-Based Sensors, Fourier Optics, High-Pass Spatial Filtering, Low Contrast",
author = "Sebastian Valencia and Joseph Cox and Amit Ashok and Nicholas Morley",
note = "Publisher Copyright: {\textcopyright} 2023 SPIE.; Unconventional Imaging, Sensing, and Adaptive Optics 2023 ; Conference date: 21-08-2023 Through 24-08-2023",
year = "2023",
doi = "10.1117/12.2678160",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Dolne, {Jean J.} and Spencer, {Mark F.} and Bose-Pillai, {Santasri R.}",
booktitle = "Unconventional Imaging, Sensing, and Adaptive Optics 2023",
}