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Visual averaging of color and motion| old_uid | 5740 |
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| title | Visual averaging of color and motion |
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| start_date | 2008/12/01 |
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| schedule | 11h-12h30 |
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| online | no |
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| summary | I shall present some new illusions of color, developed with Rob van Lier and Mark Vergeer. We show that a single adapting pattern can give afterimages of different colors at the same location, according to black contours within the white test field. This shows that colors of an afterimage are spatially averaged within but not across contours. This can be generalised to real colors as well. I shall also demonstrate "zigzag motion", in which a random-dot field alternately makes small jumps to the right, alternating with jumps 10 times as large downwards. The perceived direciton of this motion vaires with viewing distance, being apparently to the right viewed from afar and downward when viewd from close up. The resulting motin aftereffects are often NOT opposite to the perceived direciotn of adpating motion. Results show separate adpatation of fast and slow channels, and indicate a stronge preference for some velocities over other. |
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| responsibles | Waszak |
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