In three-dimensional (3-D) cluttered scenes such as foliage, deeper surfaces often are more shadowed and hence darker, and so depth and luminance often have negative covariance. We examined whether the sign of depth-luminance covariance plays a role in depth perception in 3-D clutter. We compared scenes rendered with negative and positive depth-luminance covariance where positive covariance mea...

Color is an inner, highly subjective experience only triggered by properties of light from the external world. Actual color perceptions are inextricably linked to (i) visual processing properties of observers that can vary greatly across individuals, and (ii) minor changes in viewing circumstances. Thus, it can be argued that color is not of this world, or, that color is not a veridical, or eve...

Recent theories propose that language comprehension can influence perception at the low level of perceptual system. Here, we used an adaptation paradigm to test whether processing language caused color adaptation in the visual system. After prolonged exposure to a color linguistic context, which depicted red, green, or non-specific color scenes, participants immediately performed a color detect...

© Toward Robust Categorical Color Perception Giordano Beretta, Nathan Moroney, John Ludd Recker HP Laboratories HPL-2009-146 color difference; language; color naming When implementing a software service for printing on commercial presses, it may be necessary to allow a casual user to modify the color rendering to remove a colorcast. In variable data printing, colored text on a colored backgroun...

Color quantization is an important part of image processing, image formation, and related research. This paper presents a novel color image quantization algorithm which addresses the question of how to incorporate principles of human perception of color variation into the process of quantization. The color variation measure, calculated first in CIE Lab color space, is used to evaluate color var...

Color science research, color image information processing research and development, as well as color printer product technology development, performed in relation to color image information processing, which is one of the core technologies of the color printing solutions at Oki Data, are described in three chapters of this paper. I should mention that this paper does not provide a detailed des...

Recent psychophysical studies have been interpreted to indicate that the perception of motion temporally either lags or is synchronous with the perception of color. These results appear to be at odds with neurophysiological data, which show that the average response-onset latency is shorter in the cortical areas responsible for motion (e.g., MT and MST) than for color processing (e.g., V4). The...

Visual texture segregation is the perceptual phenomenon illustrated in figure 17.1. In this image a rectangular area composed of small X-shaped patterns appears as a distinct region against a background of L-shaped patterns. This segregation occurs rapidly and unconsciously, without effort or search. The rectangular area composed of Tshaped patterns, however, does not appear as a distinct regio...