Spatial competition on the master-saliency map

Frontiers in Psychology

Ursula Schade¹ 

关键词: early vision;    saliency map;    master map;    texture segmentation;    retinal eccentricity;    critical distance;    non-classical receptive fields;   

DOI  :  10.3389/fpsyg.2013.00394

学科分类：心理学（综合）

来源: Frontiers

【 摘 要 】

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.

【 授权许可】

CC BY