scholarly journals Optimal integration of heading specified by optic flow and target egocentric direction

2018 ◽  
Vol 18 (10) ◽  
pp. 1044
Author(s):  
Wei Sun ◽  
Zhenyu Zhu ◽  
Jing Chen ◽  
Guangtao Zhai ◽  
Michael Landy ◽  
...  
Keyword(s):  
Optic Flow ◽  
Optimal Integration ◽  
Egocentric Direction

scholarly journals Optic-flow and egocentric-direction strategies in walking: Central vs peripheral visual field

2005 ◽  
Vol 45 (25-26) ◽  
pp. 3117-3132 ◽  
Author(s):  
Kathleen A. Turano ◽  
Dylan Yu ◽  
Lei Hao ◽  
John C. Hicks
Keyword(s):  
Visual Field ◽  
Optic Flow ◽  
Peripheral Visual Field ◽  
Egocentric Direction

Influence of optic flow on the control of heading and target egocentric direction during steering toward a goal

2014 ◽  
Vol 112 (4) ◽  
pp. 766-777 ◽  
Author(s):  
Li Li ◽  
Diederick C. Niehorster
Keyword(s):  
Optic Flow ◽  
Theoretic Approach ◽  
Global Flow ◽  
Response Delay ◽  
Control Precision ◽  
Direct Support ◽  
Flow Information ◽  
Control Response ◽  
Optic Flow Information ◽  
Egocentric Direction

Although previous studies have shown that people use both optic flow and target egocentric direction to walk or steer toward a goal, it remains in question how enriching the optic flow field affects the control of heading specified by optic flow and the control of target egocentric direction during goal-oriented locomotion. In the current study, we used a control-theoretic approach to separate the control response specific to these two cues in the visual control of steering toward a goal. The results showed that the addition of optic flow information (such as foreground motion and global flow) in the display improved the overall control precision, the amplitude, and the response delay of the control of heading. The amplitude and the response delay of the control of target egocentric direction were, however, not affected. The improvement in the control of heading with enriched optic flow displays was mirrored by an increase in the accuracy of heading perception. The findings provide direct support for the claim that people use the heading specified by optic flow as well as target egocentric direction to walk or steer toward a goal and suggest that the visual system does not internally weigh these two cues for goal-oriented locomotion control.

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