Optical contrast amplification for enhancing event-based vision

Sebastian Valencia; Joseph Cox; Amit Ashok; Nicholas Morley

doi:10.1117/12.2678160

3 October 2023 Optical contrast amplification for enhancing event-based vision

Sebastian Valencia, Joseph Cox, Amit Ashok, Nicholas Morley

Proceedings Volume 12693, Unconventional Imaging, Sensing, and Adaptive Optics 2023; 126930Y (2023) https://doi.org/10.1117/12.2678160
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

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.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Sebastian Valencia, Joseph Cox, Amit Ashok, and Nicholas Morley "Optical contrast amplification for enhancing event-based vision", Proc. SPIE 12693, Unconventional Imaging, Sensing, and Adaptive Optics 2023, 126930Y (3 October 2023); https://doi.org/10.1117/12.2678160

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available