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Parallelism and Rectangularity for Perceiving a 3D Scene

Student: Ekaterina Koshmanova

Supervisor: Tadamasa Sawada

Faculty: Faculty of Social Sciences

Educational Programme: Cognitive Sciences and Technologies: From Neuron to Cognition (Master)

Year of Graduation: 2018

The perception of a pair of contours in a retinal image cannot be understood simply by adding up the perceptions of the individual contours. I compared the perception of configurations of contours in four psychophysical experiments. The results of the first three experiments were analyzed so that the quantitative comparison of the perceived configurations was possible. Thresholds estimated were substantially lower from a perpendicular junction than from a single contour or from a non-perpendicular junction. The lowest thresholds were observed from a pair of parallel contours. The results suggest that the visual system is sensitive to perpendicular junctions and parallel contours in a retinal image. The results of the fourth experiment showed that the visual system is more sensitive to the parallel contours than the converging contours. The role of perpendicular and parallel contours in perception of 3D visual scene is discussed.

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