A directionally selective collision-sensing visual neural network based on fractional-order differential operator

Frontiers in Neurorobotics

Neuroscience

Yi Zheng¹  Yusi Wang¹  Jigen Peng¹  Haiyang Li² 

[1] Machine Life and Intelligence Research Centre, School of Mathematics and Information Science, Guangzhou University, Guangzhou, China;null;

关键词: direction selectivity;    fractional-order differential operator;    neural modeling;    collision sensing;    real complex scene;   

DOI  :  10.3389/fnbot.2023.1149675

 received in 2023-01-22, accepted in 2023-03-30,  发布年份 2023

来源: Frontiers

【 摘 要 】

In this paper, we propose a directionally selective fractional-order lobular giant motion detector (LGMD) visual neural network. Unlike most collision-sensing network models based on LGMDs, our model can not only sense collision threats but also obtain the motion direction of the collision object. Firstly, this paper simulates the membrane potential response of neurons using the fractional-order differential operator to generate reliable collision response spikes. Then, a new correlation mechanism is proposed to obtain the motion direction of objects. Specifically, this paper performs correlation operation on the signals extracted from two pixels, utilizing the temporal delay of the signals to obtain their position relationship. In this way, the response characteristics of direction-selective neurons can be characterized. Finally, ON/OFF visual channels are introduced to encode increases and decreases in brightness, respectively, thereby modeling the bipolar response of special neurons. Extensive experimental results show that the proposed visual neural system conforms to the response characteristics of biological LGMD and direction-selective neurons, and that the performance of the system is stable and reliable.

【 授权许可】

Unknown   
Copyright © 2023 Wang, Li, Zheng and Peng.