The processing of linear perspective and binocular information for action and perception

Bruggeman, Hugo; Yonas, Albert; Konczak, Jürgen

doi:10.1016/j.neuropsychologia.2006.11.004

Cited by 12 publications

(9 citation statements)

References 15 publications

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“…This model of sensorimotor adaptation to a biased depth cue can account for some dissociations between perceptual judgments and visually guided actions [5] without supposing a fixed preference for stereo information in motor planning. Rather, the model maintains that motor planning relies on the same 3D shape estimates as perception, but is additionally shaped by the contributions of an adjustable internal state.…”

Section: Resultsmentioning

confidence: 99%

“…For example, Bruggeman et al . [5] presented participants with the Ames window illusion, which is created by putting carefully constructed texture cues specifying a 3D scene in conflict with stereo cues specifying the actual scene, a flat surface. When participants were asked to make perceptual judgments regarding the degree of surface slant, they were misled by the biased texture cues.…”

Section: Introductionmentioning

confidence: 99%

“…So, unlike the study of Bruggeman et al . [5], which involved a constant bias in the texture cue (and thus a relatively constant perceptual bias), the errors experienced in Knill’s study [6] were variable, changing sign randomly throughout the task. Yet the results were similar: the average orientation of the handheld object when it made contact with the surface was slightly closer to the stereo slant.…”

Section: Introductionmentioning

confidence: 99%

“…In Experiment 1, we show that a standard computational model of sensorimotor adaptation can account for changes in the motor response during exposure to a constant bias in stereo information; this is the converse of Bruggeman et al .’s experimental design [5], which involved a constant bias in texture information. In Experiment 2, we examine how the motor response changes over time in the more complex scenario where one cue becomes uncorrelated with sensory feedback, producing variable errors.…”

Section: Introductionmentioning

confidence: 99%

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Sensorimotor adaptation compensates for distortions of 3D shape information

Cesanek

Taylor

Domini

2019

Preprint

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Visual perception often fails to recover the veridical 3D shape of objects in the environment due to ambiguity and variability in the available depth cues. However, we rely heavily on 3D shape estimates when planning movements, for example reaching to pick up an object from a slanted surface. Given the wide variety of distortions that can affect 3D perception, how do our actions remain accurate across different environments? One hypothesis is that the visuomotor system performs selective filtering of 3D information to minimize distortions. Indeed, some studies have found that actions appear to preferentially target stereo information when it is put in conflict with texture information. However, since these studies analyze averages over multiple trials, this apparent preference could be produced by sensorimotor adaptation. In Experiment 1, we create a set of cue-conflict stimuli where one available depth cue is affected by a constant bias. Sensory feedback rapidly aligns the motor output with physical reality in just a few trials, which can make it seem as if action planning selectively relies on the reinforced cue—yet no change in the relative influences of the cues is necessary to eliminate the constant errors. In contrast, when one depth cue becomes less correlated with physical reality, variable movement errors will occur, causing canonical adaptation to fail as the opposite error corrections cancel out. As a result, canonical adaptation cannot explain the preference for stereo found in studies with variable errors. However, Experiment 2 shows that persistent errors can produce a novel form of adaptation that gradually reduces the relative influence of an unreliable depth cue. These findings show that grasp control processes are continuously modified based on sensory feedback to compensate for both biases and noise in 3D visual processing, rather than having a hardwired preference for one type of depth information.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sensorimotor adaptation compensates for distortions of 3D shape information

Cesanek

Taylor

Domini

2019

Preprint

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“…There exists abundant research in this field. Investigation of the processing of linear perspective and binocular information for the perceptual judgment of depth is discussed in [11,12]. Different projection transformations defining various perspective representations are presented in [12].…”

Section: Introductionmentioning

confidence: 99%

Computer-Aided Panoramic Images Enriched by Shadow Construction on a Prism and Pyramid Polyhedral Surface

Dzwierzynska

2017

Symmetry

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Abstract:The aim of this study is to develop an efficient and practical method of a direct mapping of a panoramic projection on an unfolded prism and pyramid polyhedral projection surface with the aid of a computer. Due to the fact that straight lines very often appear in any architectural form we formulate algorithms which utilize data about lines and draw panoramas as plots of functions in Mathcad software. The ability to draw panoramic images of lines enables drawing a wireframe image of an architectural object. The application of the multicenter projection, as well as the idea of shadow construction in the panoramic representation, aims at achieving a panoramic image close to human perception. The algorithms are universal as the application of changeable base elements of panoramic projection-horizon height, station point location, number of polyhedral walls-enables drawing panoramic images from various viewing positions. However, for more efficient and easier drawing, the algorithms should be implemented in some graphical package. The representation presented in the paper and the method of its direct mapping on a flat unfolded projection surface can find application in the presentation of architectural spaces in advertising and art when drawings are displayed on polyhedral surfaces and can be observed from multiple viewing positions.

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