Long range interactions between object-motion and self-motion in the perception of movement in depth

Gray, Robert C.; Macuga, Kristen L.; Regan, D.

doi:10.1016/j.visres.2003.09.001

Cited by 28 publications

(23 citation statements)

References 40 publications

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“…Other studies have found a decreased ability to perceive movement in depth when moving objects are present (Gray, Macuga, & Regan, 2004). Results of these studies, considered together, suggest that both expansion and bearing information are used in detecting a collision and the efficacy of these information sources may be reduced when objects are present in the scene.…”

Section: Introductionmentioning

confidence: 72%

Collision Detection in Cluttered Driving Scenes

Lemon

Andersen

2015

Proceedings of the 8th International Driving Symposium on Human Factors in Driver Assessment, Training, and Vehicle Design: Dri

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Summary:The purpose of the present experiment was to examine whether drivers' detection of collisions was altered when the driving scene was cluttered with scene objects. In this experiment stationary scene objects were manipulated by positioning them behind an approaching object and driver motion induced. We found that observers' collision detection performance (d') decreased with the presence of scene objects. These results indicate that the ability to detect a collision is altered by the presence of scene objects. In addition, performance was dependent on display duration, with greater sensitivity at increased durations. Moreover, the results showed a significant criterion shift between scene objects present and scene objects absent, with a decrease in identifying a collision object (hit rate) when scene objects were present but no difference in identification of a collision event when scene objects were absent. This suggests that the decreased performance was due to the inability to accurately determine a collision event because of apparent motion of background scene objects due to driver motion. Because the displays used in this experiment are akin to driving in a cluttered environment, the results of this research have important implications regarding driving safety and crash rates particularly in urban environments with complex scenes. Specifically, the results suggest that one factor in cluttered driving scenes is the apparent motion of background scene objects due to driver motion.

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Section: Introductionmentioning

confidence: 72%

Collision Detection in Cluttered Driving Scenes

Lemon

Andersen

2015

Proceedings of the 8th International Driving Symposium on Human Factors in Driver Assessment, Training, and Vehicle Design: Dri

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“…Previous psychophysical work on TTC judgments reported the involvement of optic flow in tau judgments (Gray et al, 2004, Gray & Regan, 2000), and specifically the importance of global tau for TTP judgments in the absence of local tau information (Kaiser & Mowafy, 1993). A study by Kerzel et al (1999), has contradicted this view by showing that global tau is not needed for TTP judgments when local tau cues are absent.…”

Section: Discussionmentioning

confidence: 99%

“…Interestingly, Gray and colleagues (2010, 2004, 2000), have reported a strong dependence of time-to-contact (TTC) judgments on self motion-in-depth, suggesting that object motion and self-motion are integrated in the perception of object movement in depth. The discrepancies between these findings and those of Kerzel et al, may be due to differences in the degree of vection experienced by subjects.…”

Section: Introductionmentioning

confidence: 99%

Global flow impacts time-to-passage judgments based on local motion cues

et al. 2011

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We assessed the effect of the coherence of optic flow on time-to-passage judgments in order to investigate the strategies that observers use when local expansion information is reduced or lacking. In the standard display, we presented a cloud of dots whose image expanded consistent with constant observer motion. The dots themselves, however, did not expand and were thus devoid of object expansion cues. Only the separations between the dots expanded. Subjects had to judge which of two colored target dots, presented at different simulated depths and lateral displacements would pass them first. Image velocities of the target dots were chosen so as to correlate with time-to-passage only some of the time. When optic flow was mainly incoherent, subjects’ responses were biased and relied on image velocities rather than on global flow analysis. However, the bias induced by misleading image velocity cues diminished as a function of the coherence of the optic flow. We discuss the results in the context of a global tau mechanism and settle a debate whether local expansion cues or optic flow analysis are the basis for time-to-passage estimation.

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“…While several previous studies address a moving observer's ability to judge the trajectory of a moving object or estimate its time-to-contact (Gray, Macuga, & Regan, 2004;Gray & Regan, 2000;Matsuyima & Ando, 2009;Rushton & Warren, 2005;Warren & Rushton, 2008;Warren & Rushton, 2009a;Warren & Rushton, 2009b), few examine how one detects the moving object within the flow field. Two studies have used visual search criteria to examine how quickly people can identify a moving object in a radial flow field (Royden, Wolfe, & Klempen, 2001;Rushton, Bradshaw, & Warren, 2007).…”

Section: Previous Researchmentioning

confidence: 99%

The effect of monocular depth cues on the detection of moving objects by moving observers

2016

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An observer moving through the world must be able to identify and locate moving objects in the scene. In principle, one could accomplish this task by detecting object images moving at a different angle or speed than the images of other items in the optic flow field. While angle of motion provides an unambiguous cue that an object is moving relative to other items in the scene, a difference in speed could be due to a difference in the depth of the objects and thus is an ambiguous cue. We tested whether the addition of information about the distance of objects from the observer, in the form of monocular depth cues, aided detection of moving objects. We found that thresholds for detection of object motion decreased as we increased the number of depth cues available to the observer.

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Long range interactions between object-motion and self-motion in the perception of movement in depth

Cited by 28 publications

References 40 publications

Collision Detection in Cluttered Driving Scenes

Collision Detection in Cluttered Driving Scenes

Global flow impacts time-to-passage judgments based on local motion cues

The effect of monocular depth cues on the detection of moving objects by moving observers

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