Searched for: subject:"perception"
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document
Wijntjes, M.W.A. (author), De Ridder, H. (author)
Whereas the 17th century painter Canaletto was a master in linear perspective of the architectural elements, he seems to have had considerable difficulty with linear perspective of shadows. A common trick to avoid shadow perspective problems is to set the (solar) illumination direction parallel to the projection screen. We investigated in one...
conference paper 2014
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Pont, S.C. (author), Koenderink, J.J. (author), Van Doorn, A.J. (author), Wijntjes, M.W.A. (author), Te Pas, S.F. (author)
We present a novel setup in which real objects made of different materials can be mixed optically. For the materials we chose mutually very different materials, which we assume to represent canonical modes. The appearance of 3D objects consisting of any material can be described as linear superposition of 3D objects of different canonical...
conference paper 2012
document
Pont, S.C. (author), Van Doorn, A.J. (author), Te Pas, S.F. (author), Wijntjes, M.W.A. (author), Koenderink, J.J. (author)
We present a novel setup in which real objects made of two different materials can be mixed optically in a linearly weighted manner. We conducted a psychophysical experiment in which observers rated optical mixtures of the three combinations of glossy, matte, and velvety green birds. The observers rated the materials on four scales: matte-glossy...
conference paper 2012