陰影からの立体形状知覚 : 複数の制約条件の間の関係に関する検討(<特集>VR心理学5〜脳機能計測とVR〜)

概要

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The relationship between two constraints related to perception of 3 dimensional shape from shading was examined by using stimuli with temporal modulation in shading gradient (circular patches which appear either concave or convex). The temporal frequency was manipulated between 0.5 - 8 Hz. In experiments, observers reported perception from three alternatives: (1) surface deformation, (2) movement of light source, (3) flickering. Observers perceived either (1) or (2) when the frequency was below 4 Hz, and (3) for the frequency above 4 Hz. However, the two perception modes in lower frequency range varied when the stimulus configuration, i.e. number of patches, direction and homogeneity of shading gradient, was manipulated. However, all results can be accounted for by assuming the existence of the two constraints and additional assumption about homogeneity.
2013-03-31