Spatial distance between target and irrelevant patch modulates detection in a texture segmentation task

Schade, Ursula; Meinecke, Cristina

doi:10.1163/156856809789822998

Cited by 4 publications

(2 citation statements)

References 30 publications

(36 reference statements)

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“…The distance-dependency of the patch-effect in our study is similar to that reported by Schade and Meinecke (2009, 2011), however, they studied iso -dimensional texture irregularities (orientation). Cross-dimensional distance effects and critical distances were observed in visual search tasks, as mentioned in the Introduction Section.…”

Section: Discussionsupporting

confidence: 89%

“…There is already experimental evidence for spatial signal competition on feature map level from two texture segmentation studies (Schade and Meinecke, 2009, 2011). In those studies, a texture irregularity in the stimulus was the target to be detected, and a task-irrelevant texture irregularity (“patch”) was inserted into the backward mask; the spatial distance between target and patch was varied systematically.…”

Section: Introductionmentioning

confidence: 99%

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Spatial competition on the master-saliency map

Schade¹,

Meinecke²

2013

Front. Psychol.

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The saliency map model (Itti and Koch, 2000) is a hierarchically structured computational model, simulating visual saliency processing. Iso-feature processing on feature maps and conspicuity maps precedes cross-dimensional signal processing on the master map, where the most salient location of the visual field is selected. This texture segmentation study focuses on a possible spatial structure on the master map. In four experiments the spatial distance between a texture irregularity in the stimulus (“target”) and a cross-dimensional task irrelevant texture irregularity in the backward mask (“patch”) was varied. The results show that the target-patch distance modulates target detection, and that this modulation is limited to critical distances around the target. We conclude that the signals from different feature dimensions compete on a spatial master map. There is first evidence that the critical distances increase with target eccentricity.

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Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Spatial competition on the master-saliency map

Schade¹,

Meinecke²

2013

Front. Psychol.

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Texture segmentation: Do the processing units on the saliency map increase with eccentricity?

Schade

Meinecke

2011

Vision Research

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The saliency map is a computational model and has been constructed for simulating human saliency processing, e.g. pop-out target detection (e.g. Itti & Koch, 2000). In this study the spatial structure on the saliency map was investigated. It is proposed that the saliency map is structured into processing units whose size is increasing with retinal eccentricity. In two experiments the distance between a target in the stimulus and an irrelevant structure in the mask was varied systematically. Our findings had two main points. Firstly, in texture segmentation tasks the saliency signals from two texture irregularities interfere, when these irregularities appear within a critical spatial distance. Second, the critical distances increase with target eccentricity. The eccentricity-dependent critical distances can be interpreted as crowding effects. It is assumed that additionally to the target eccentricity, also the strength of a saliency signal can determine the spatial area of its impairing influence.

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Flexible contextual modulation of naturalistic texture perception in peripheral vision

Herrera

Coen-Cagli

Gómez-Sena

2020

Preprint

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Peripheral vision comprises most of our visual field, and is essential in guiding visual behavior. Its characteristic low resolution has been explained by the most influential theory of peripheral vision as the product of representing the visual input using summary-statistics. Despite its success, this account may provide a limited understanding of peripheral vision, because it neglects processes of perceptual grouping and segmentation. To test this hypothesis, we studied how contextual modulation, namely the modulation of the perception of a stimulus by its surrounds, interacts with segmentation in human peripheral vision. We used naturalistic textures, which are directly related to summary-statistics representations. We show that segmentation cues affect contextual modulation, and that this is not captured by the summary-statistics model. We then characterize the effects of different texture statistics on contextual modulation, providing guidance for extending the model, as well as for probing neural mechanisms of peripheral vision.

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Spatial distance between target and irrelevant patch modulates detection in a texture segmentation task

Cited by 4 publications

References 30 publications

Spatial competition on the master-saliency map

Spatial competition on the master-saliency map

Texture segmentation: Do the processing units on the saliency map increase with eccentricity?

Flexible contextual modulation of naturalistic texture perception in peripheral vision

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