Sensory context influence on first-order orientation perception
Alternative Title不同环境方位信息对一阶方位信息的感知的影响
Jinfeng Huanga; Tzvetomir Tzvetanova; Tzvetomir Tzvetanov
Conference Name2017年第二届曲阜视觉科学会议
Conference Date2017.7.1
Conference Place曲阜

PURPOSE: Orientation information (OI) is fundamental and crucial for our daily life. It can be processed as first-order luminance modulation, or it can be based upon higher level cues as contrast or texture, which are called second-order OI or higher. Our studies focus on the first-order OI processing and sought to answer the following two important questions: (1) dissociate first- and second-order orientation effects on the simple center-surround tilt illusion paradigm obtained with lateral flankers and (2) test whether the first-order spatio-orientation interactions follow the expected spatial segregation pattern of excitatory and inhibitory interactions (EI inter.) assumed in V1 models.
METHODS: We used as stimulus three Gabors patches whose centers stood in a straight line. By manipulating the bilateral Gabors’ orientations (flankers) and the global straight line orientation (envelope), and asking subjects to discriminate the orientation of the central target Gabor patch, we mapped the full two-dimensional spatio-orientation interaction structure onto the tilt repulsion effect of the central target Gabor. Seven adults participated in the experiment.
RESULTS: We observed a striking regular behaviour in the data. There was a repetitive pattern of flanker’s orientation effects onto perceived value across all global positions of the flankers, with the later 2nd order OI simply shifting vertically the reference point for 1st order OI effects. The assumed EI interactions of V1 models failed to predict our results.
CONCLUSIONS: Our data showed that the interaction of first-order elements, supposedly raised from the low-level visual cortex are created through spatial iso-orientation inhibitory interactions and that the second-order OI modulates these interactions in a global manner, without any first- and second-order interactions of OI.

Keywordorientation information first-order second-order model spatial context
Subject Area视觉心理物理与模型(一)
Document Type会议论文
Corresponding AuthorTzvetomir Tzvetanov
AffiliationChinese Academy of Sciences Key Laboratory of Brain Function and Disease, and School of Life Sciences, University of Science and Technology of China
Recommended Citation
GB/T 7714
Jinfeng Huanga,Tzvetomir Tzvetanova,Tzvetomir Tzvetanov. Sensory context influence on first-order orientation perception[C],2017.
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