Perception of gaze direction based on luminance ratio
Perception of gaze direction based on luminance ratio
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作者：
Ando, S
改变巩膜一侧的亮度会引起视线明显转向巩膜较暗的一侧（Ando, 2002, Perception 31 657-674）。然而，当巩膜和周围的皮肤同时变暗时，视线的明显方向比仅巩膜变暗时要小。结果表明，凝视判断的一种机制是基于对眼睛与周围区域之间局部亮度比的简单分析。
Changing the luminance of one side of the sclera induces an apparent shift of the perceived direction of gaze toward the darker side of the sclera (Ando, 2002 Perception 31 657-674). However, when both the sclera and the skin surrounding it were darkened simultaneously as if by a cast shadow, the apparent direction of gaze shifted less than when only the sclera was darkened. The results suggest that one mechanism for gaze judgment is based on a simple analysis of the local luminance ratio between the eye and the surrounding region.