Landing with Time-to-Contact and Ventral Optic Flow Estimates

2012 ◽  
Vol 35 (4) ◽  
pp. 1362-1367 ◽  
Author(s):  
Dario Izzo ◽  
Guido de Croon
Keyword(s):  
Optic Flow ◽  
Time To Contact

Global versus Local Image Expansion in Estimating Time-to-Contact from Complex Optic Flow

Perception ◽  
10.1068/p5271 ◽  
2005 ◽  
Vol 34 (5) ◽  
pp. 577-585 ◽  
Author(s):  
Christos D Giachritsis ◽  
Mike G Harris
Keyword(s):  
Optic Flow ◽  
Local Analysis ◽  
Systematic Effect ◽  
Global Pattern ◽  
Time To Contact ◽  
Local Expansion ◽  
Rotation Rates ◽  
Global And Local ◽  
Local Image ◽  
Image Expansion

Previous work (Harris and Giachritsis 2000, Vision Research40 601–611) has shown that, when global and local image expansion are placed in conflict, estimates of time-to-contact (TTC) are based almost exclusively upon global expansion. Here we extend this finding by demonstrating that global image expansion continues to predominate even under conditions that seem more favourable to a local analysis. We added a global rotation to the stimulus so that the global pattern of expansion was distorted while leaving the local expansion unaffected. Even under relatively high rotation rates (30° s−1), local expansion continued to have little systematic effect upon estimates of TTC.

scholarly journals Active sampling of the optic flow to predict time-to-contact

2020 ◽  
Vol 20 (11) ◽  
pp. 795
Author(s):  
Borja Aguado Ramirez ◽  
Joan López-Moliner
Keyword(s):  
Optic Flow ◽  
Active Sampling ◽  
Time To Contact

Multiresolutional Optic Flow

2003 ◽  
Author(s):  
Matthew J. Ahlert
Keyword(s):  
Optic Flow

Does the Presence of Biological Motion Facilitate Time-to-Contact Estimations?

2020 ◽  
Vol 64 (1) ◽  
pp. 1874-1875
Author(s):  
Ellen Szubski M.S. ◽  
Savana King ◽  
Rick Tyrrell Ph.D.
Keyword(s):  
Biological Motion ◽  
Time To Contact

scholarly journals Optic Flow: Perceiving and Acting in a 3-D World

i-Perception ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 204166952098725
Author(s):  
Brian Rogers
Keyword(s):  
Visual Perception ◽  
Optic Flow ◽  
Ecological Niche ◽  
Perception And Action ◽  
Ecological Approach ◽  
Visual World ◽  
Changing Patterns ◽  
The Many ◽  
Concept Of Information ◽  
Radical Ideas

In 1979, James Gibson completed his third and final book “The Ecological Approach to Visual Perception”. That book can be seen as the synthesis of the many radical ideas he proposed over the previous 30 years – the concept of information and its sufficiency, the necessary link between perception and action, the need to see perception in relation to an animal's particular ecological niche and the meanings (affordances) offered by the visual world. One of the fundamental concepts that lies beyond all of Gibson's thinking is that of optic flow: the constantly changing patterns of light that reach our eyes and the information it provides. My purpose in writing this paper has been to evaluate the legacy of Gibson's conceptual ideas and to consider how his ideas have influenced and changed the way we study perception.

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