Form Perception

201.

Perception of objects that are translating and rotating.

The motion of objects that are both translating and rotating can be decomposed into an infinite number of translational and rotational combinations. How, then, do such stimuli routinely elicit specific percepts and behavioral responses that are usually ...
Zhiyong Yang, Amita Shimpi, Dale Purves (Perception, 2002)
perception-objects-translating-rotating.asp

202.

Are spatial frequencies integrated from coarse to fine?

The existence of a temporal anisotropy in the integration of spatial frequencies, such that spatial frequencies are integrated more effectively if they are available from low to high through time, has been examined in a series of experiments. In the ...
Eugene McSorley, John M Findlay (Perception, 2002)
spatial-frequencies-integrated-coarse-fine.asp

203.

The boogie-woogie illusion.

A grid of vertical and horizontal lines, each composed of light and dark squares, is moved rigidly at 45 degrees to the vertical on a gray surround. When the luminance of the background is set midway between the luminances of the light and dark squares, ...
Patrick Cavanagh, Stuart Anstis (Perception, 2002)
boogie-woogie-illusion.asp

204.

Achromatic transparency and the role of local contours.

In this paper we investigate the role of contours and junctions in the perception of single-plane achromatic transparency. In order to measure the accuracy with which observers encode transparency, a six-luminance stimulus was employed in which the ...
Reza Kasrai, Frederick A A Kingdom (Perception, 2002)
achromatic-transparency-role-local-contours.asp

205.

Illuminant estimation as cue combination.

This work briefly describes a model for illuminant estimation based on combination of candidate illuminant cues. Many of the research issues concerning cue combination in depth and shape perception translate well to the study of surface color perception. ...
Laurence T Maloney (J Vis, 2002)
illuminant-estimation-cue-combination.asp

206.

Temporal dynamics of the human response to symmetry.

Symmetry is a highly salient feature of animals, plants, and the constructed environment. Although the perceptual phenomenology of symmetry processing is well understood, little is known about the underlying neural mechanisms. Here we use visual evoked ...
Anthony M Norcia, T Rowan Candy, Mark W Pettet, Vladimir Y Vildavski, Christopher W Tyler (J Vis, 2002)
temporal-dynamics-human-response-symmetry.asp

207.

Flank transparency: the effects of gaps, line spacing, and apparent motion.

We analyze the properties of a dynamic color-spreading display created by adding narrow colored flanks to rigidly moving black lines where these lines fall in the interior of a stationary virtual disk. This recently introduced display (Wollschläger et ...
Daniel Wollschläger, Antonio M Rodriguez, Donald D Hoffman (Perception, 2002)
flank-transparency-effects-gaps-line-spacing-apparent-motion.asp

208.

In search of king Solomons ring: cognitive and communicative studies of Grey parrots (Psittacus erithacus).

During the past 24 years, I have used a modeling technique (M/R procedure) to train Grey parrots to use an allospecific code (English speech) referentially; I then use the code to test their cognitive abilities. The oldest bird, Alex, labels more than 50 ...
Irene M Pepperberg (Brain Behav Evol, 2002)
search-king-solomon-s-ring-cognitive-communicative-studies-grey.asp

209.

How do the internal details of the object contribute to recognition?

Object recognition becomes difficult when the main axis of the object is foreshortened. It has previously been reported that this so-called foreshortened disadvantage is larger when the silhouette of the object is presented than when the line drawing of ...
Hidemichi Mitsumatsu, Kazuhiko Yokosawa (Perception, 2002)
internal-details-object-contribute-recognition.asp

210.

Second-order statistics of colour codes modulate transformations that effectuate varying degrees of scene invariance and illumination invariance.

We argue, from an ethology-inspired perspective, that the internal concepts surface colours and illumination colours are part of the data format of two different representational primitives. Thus, the internal concept of colour is not a unitary one but ...
Rainer Mausfeld, Johannes Andres (Perception, 2002)
second-order-statistics-colour-codes-modulate-transformations.asp