Results for 'luminance'

7 found
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  1.  19
    Color for the Perceptual Organization of the Pictorial Plane: Victor Vasarely's Legacy to Gestalt Psychology.Birgitta Dresp-Langley & Adam Reeves - 2020 - Heliyon 6 (6):e04375.
    Victor Vasarely's (1906–1997) important legacy to the study of human perception is brought to the forefront and discussed. A large part of his impressive work conveys the appearance of striking three-dimensional shapes and structures in a large-scale pictorial plane. Current perception science explains such effects by invoking brain mechanisms for the processing of monocular (2D) depth cues. Here in this study, we illustrate and explain local effects of 2D color and contrast cues on the perceptual organization in terms of figure-ground (...)
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  2. Interaction of Color and Geometric Cues in Depth Perception: When Does Red Mean "Near"?Christophe Guibal & Birgitta Dresp - 2004 - Psychological Research 69:30-40.
    Luminance and color are strong and self-sufficient cues to pictorial depth in visual scenes and images. The present study investigates the conditions Under which luminance or color either strengthens or overrides geometric depth cues. We investigated how luminance contrasts associated with color contrast interact with relative height in the visual field, partial occlusion, and interposition in determining the probability that a given figure is perceived as ‘‘nearer’’ than another. Latencies of ‘‘near’’ responses were analyzed to test for (...)
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  3. Effects of Saturation and Contrast Polarity on the Figure-Ground Organization of Color on Gray.Birgitta Dresp-Langley & Adam Reeves - 2014 - Frontiers in Psychology 5:1-9.
    Poorly saturated colors are closer to a pure grey than strongly saturated ones and, therefore, appear less “colorful”. Color saturation is effectively manipulated in the visual arts for balancing conflicting sensations and moods and for inducing the perception of relative distance in the pictorial plane. While perceptual science has proven quite clearly that the luminance contrast of any hue acts as a self-sufficient cue to relative depth in visual images, the role of color saturation in such figure-ground organization has (...)
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  4. Depth Perception From Pairs of Overlapping Cues in Pictorial Displays.Birgitta Dresp, Severine Durand & Stephen Grossberg - 2002 - Spatial Visions 15:255-276.
    The experiments reported herein probe the visual cortical mechanisms that control near–far percepts in response to two-dimensional stimuli. Figural contrast is found to be a principal factor for the emergence of percepts of near versus far in pictorial stimuli, especially when stimulus duration is brief. Pictorial factors such as interposition (Experiment 1) and partial occlusion Experiments 2 and 3) may cooperate, as generally predicted by cue combination models, or compete with contrast factors in the manner predicted by the FACADE model. (...)
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  5. Simultaneous Brightness and Apparent Depth From True Colors on Grey: Chevreul Revisited.Birgitta Dresp-Langley & Adam Reeves - 2012 - Seeing and Perceiving 25 (6):597-618.
    We show that true colors as defined by Chevreul (1839) produce unsuspected simultaneous brightness induction effects on their immediate grey backgrounds when these are placed on a darker (black) general background surrounding two spatially separated configurations. Assimilation and apparent contrast may occur in one and the same stimulus display. We examined the possible link between these effects and the perceived depth of the color patterns which induce them as a function of their luminance contrast. Patterns of square-shaped inducers of (...)
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  6. Phenomenal Qualities and the Development of Perceptual Integration.Mariann Hudak, Zoltan Jakab & Ilona Kovacs - 2013 - In Liliana Albertazzi (ed.), The Wiley-Blackwell Handbook of Experimental Phenomenology; Visual Perception of Shape, Space and Appearance. Wiley-Blackwell.
    In this chapter, data concerning the development of principal aspects of vision is reviewed. First, the development of colour vision and luminance perception is discussed. Relevant data accumulated so far indicates that perception of colour and luminance is present by 6-9 months of age. The presence of typical color illusions at this age suggests that the phenomenal character of color experience is comparable to that of adults well before the first birthday. Thus it seems plausible that color perception (...)
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  7. Dynamic Characteristics of Spatial Mechanisms Coding Contour Structures. Dresp - 1999 - Spatial Vision 12:29-42.
    Spatial facilitation has been observed with luminance-defined, achromatic stimuli on achromatic backgrounds as well as with targets and inducers defined by colour contrast. This paper reviews psychophysical results from detection experiments with human observers showing the conditions under which spatially separated contour inducers facilitate the detection of simultaneously presented target stimuli. The findings point towards two types of spatial mechanisms: (i) Short-range mechanisms that are sensitive to narrowly spaced stimuli of small size and, at distinct target locations, selective to (...)
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