DocumentCode :
1837569
Title :
Visual information processing in direct collision course - a simple computational model
Author :
Dezhong, Yao ; Ling, Wang
Author_Institution :
Sch. of Life Sci. & Technol., China Univ. of Electron. Sci. & Technol., Chengdu, China
fYear :
2005
fDate :
26-28 May 2005
Firstpage :
131
Lastpage :
134
Abstract :
In the research of direct collision course, the computation of TTC, time to collision, is thought subjectively an important critical criteria. Formula τ ≈ θ/θ´ was usually utilized to calculate TTC where θ is the visual angle subtended by the looming object and θ´ is the derivative of θ over time. In this paper, we found that 1/τ can also be approximated by using a weighted combination of 1/(θ+B) and θ, where B is a constant. We then built a simple computational model by including an improved back propagation algorithm as a way of simulating the brain response patterns. The accurate estimation of TTC, relative definite physiological meaning of the hidden neurons, and the good plasticity and robustness of the model imply that it is a potential and realizable model and is very likely to imitate the physiological brain mechanism of the visual information processing in the direct collision course.
Keywords :
backpropagation; collision avoidance; medical computing; neural nets; neurophysiology; visual perception; TTC computation; TTC estimation; back propagation algorithm; brain response pattern simulation; collision time; computational model; direct collision course; hidden neuron; model plasticity; model robustness; neural network; physiological brain mechanism; physiological meaning; visual angle; visual information processing; visual motion; weighted combination; Animals; Biological neural networks; Brain modeling; Computational modeling; Computer networks; Information processing; Neurons; Optical control; Robustness; Sun;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Neural Interface and Control, 2005. Proceedings. 2005 First International Conference on
Print_ISBN :
0-7803-8902-6
Type :
conf
DOI :
10.1109/ICNIC.2005.1499860
Filename :
1499860
Link To Document :
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