Illusory spreading of watercolor

Devinck, Frédéric; Hardy, Joseph L.; Delahunt, Peter B.; Spillmann, Lothar; Werner, John S.

doi:10.1167/6.5.7

Cited by 21 publications

(36 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A temporal presentation was ruled out to avoid the possibility of memory effects. Free viewing has been used to study the WCE in numerous previous studies [1][2][3]6,7,16,17]. Two previous studies have used durations, respectively, of 1 s [10], not too much shorter than our estimated average duration, and 150 ms to study an achromatic variant of the WCE [4].…”

Section: Methodsmentioning

confidence: 99%

Spatial selectivity of the watercolor effect

et al. 2013

Self Cite

View full text Add to dashboard Cite

The spatial selectivity of the watercolor effect (WCE) was assessed by measuring its strength as a function of the luminance contrast of its inducing contours for different spatial configurations, using a maximum likelihood scaling procedure. The approach has previously been demonstrated to provide an efficient method for investigating the WCE as well as other perceptual dimensions. We show that the strength is narrowly tuned to the width of the contour, that it is optimal when its pair of inducing contours are of equal width, and that the strength can be increased by varying the overall size of the stimulus when the width of the inducing contour is not optimal. The results support a neural substrate that has characteristics not unlike double-opponent, color-luminance cells observed in cortical area V1.

show abstract

Section: Methodsmentioning

confidence: 99%

Spatial selectivity of the watercolor effect

et al. 2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…In contrast to the luminance conditions, color conditions for the watercolor effect, particularly for non-assimilative color spreading, have not been explored much. For assimilative color spreading, previous studies demonstrated that numerous color combinations produce the effect when the luminance condition is favorable (Pinna et al, 2001 ; Devinck et al, 2006a ). The magnitude of color spreading varied with color combinations: it was large when a complementary pair of colors was used and became much smaller when the same color was used for the IC and OC colors (Pinna et al, 2001 ; Devinck et al, 2006a ).…”

Section: Introductionmentioning

confidence: 99%

“…For assimilative color spreading, previous studies demonstrated that numerous color combinations produce the effect when the luminance condition is favorable (Pinna et al, 2001 ; Devinck et al, 2006a ). The magnitude of color spreading varied with color combinations: it was large when a complementary pair of colors was used and became much smaller when the same color was used for the IC and OC colors (Pinna et al, 2001 ; Devinck et al, 2006a ). Devinck et al ( 2006a ) also showed that color spreading was strong when the IC and the OC were saturated equally, and became weaker when the saturation of one contour was decreased.…”

Section: Introductionmentioning

confidence: 99%

Contribution of a luminance-dependent S-cone mechanism to non-assimilative color spreading in the watercolor configuration

Kimura

Kuroki

2014

Front. Hum. Neurosci.

View full text Add to dashboard Cite

In the watercolor configuration composed of wavy double contours, both assimilative and non-assimilative color spreading have been demonstrated depending on the luminance conditions of the inner and outer contours (IC and OC, respectively). This study investigated how the induced color in the watercolor configuration was modulated by combinations of the IC and the OC color, particularly addressing non-assimilative color spreading. In two experiments, the IC color was fixed to a certain color and combined with various colors selected from a hue circle centered at the background white color. Color spreading was quantified with a chromatic cancelation technique. Results showed that both the magnitude and the apparent hue of the color spreading were largely changed with the luminance condition. When the IC contrast (Weber contrast of the IC to the background luminance) was smaller in size than the OC contrast (higher IC luminance condition), the color spreading was assimilative. When the luminance condition was reversed and the IC contrast was greater than the OC contrast (lower IC luminance condition), the color spreading was non-assimilative and yellowish. When the color spreading was analyzed in terms of cone-opponent excitations, the results were consistent with the interpretation that the color spreading is explainable by a combination of chromatic diffusion from the IC and chromatically opponent induction from the OC. The color spreading in the higher IC luminance condition mainly reflected the chromatic diffusion by both (L–M) and S cone-opponent mechanisms. The non-assimilative color spreading in the lower IC luminance condition mostly reflected S-cone mediated opponent induction and the contribution of −S inducing mechanisms was differentially large. These findings provided several constraints on possible visual mechanisms underlying the watercolor effect.

show abstract

“…Finally, Pinna et al (2001) demonstrated that several different pairs of colors can generate the coloration effect (see also Devinck et al, 2005). Specifically, Devinck et al (2006) demonstrated that the coloration effect is stronger when the chromatic contrast is larger. Thus, the coloration effect depends on a conjunction of chromatic and luminance contrasts but also on spatial parameters of the inner and outer contours.…”

Section: Figure 1 About Herementioning

confidence: 90%

Effects of background and contour luminance on the hue and brightness of the Watercolor effect

Gerardin

Dojat

Knoblauch

et al. 2017

Preprint

View full text Add to dashboard Cite

22Conjoint measurement was used to investigate the joint influences of the 23 luminance of the background and the inner contour on hue-and brightness filling-24 in for a stimulus configuration generating a water-color effect (WCE), i.e., a 25 wiggly bi-chromatic contour enclosing a region with the lower luminance 26 component on the exterior. Two stimuli with the background and inner contour 27 luminances covarying independently were successively presented, and in separate 28 experiments, the observer judged which member of the pair's interior regions 29 contained a stronger hue or was brighter. Braided-contour control stimuli that 30 generated little or no perceptual filling-in were also used to assess whether 31 observers were judging the interior regions and not the contours themselves. 32Three nested models of the contributions of the background and inner contour to

show abstract

Illusory spreading of watercolor

Cited by 21 publications

References 31 publications

Spatial selectivity of the watercolor effect

Spatial selectivity of the watercolor effect

Contribution of a luminance-dependent S-cone mechanism to non-assimilative color spreading in the watercolor configuration

Effects of background and contour luminance on the hue and brightness of the Watercolor effect

Contact Info

Product

Resources

About