The watercolor effect: Quantitative evidence for luminance-dependent mechanisms of long-range color assimilation

When a dark chromatic contour delineating a figure is flanked on the inside by a brighter chromatic contour, the brighter color will spread into the entire enclosed area. This is known as the watercolor effect (WCE). Here we quantified the effect of color spreading using both color-matching and hue-cancellation tasks. Over a wide range of stimulus chromaticities, there was a reliable shift in color appearance that closely followed the direction of the inducing contour. When the contours were equated in luminance, the WCE was still present, but weak. The magnitude of the color spreading increased with increases in luminance contrast between the two contours. Additionally, as the luminance contrast between the contours increased, the chromaticity of the induced color more closely resembled that of the inside contour. The results support the hypothesis that the WCE is mediated by luminance-dependent mechanisms of long-range color assimilation.

[1]  S. Shevell,et al.  Chromatic induction from S-cone patterns , 2004, Vision Research.

[2]  B. Khang,et al.  Cues and strategies for color constancy: perceptual scission, image junctions and transformational color matching , 2002, Vision Research.

[3]  D H Brainard,et al.  The Psychophysics Toolbox. , 1997, Spatial vision.

[4]  Peter B. Delahunt,et al.  Does human color constancy incorporate the statistical regularity of natural daylight? , 2004, Journal of vision.

[5]  B. Pinna,et al.  Surface color from boundaries: a new ‘watercolor’ illusion , 2001, Vision Research.

[6]  Robert M. Boynton,et al.  Effects of field area and configuration on chromatic and border discriminations , 1987, Vision Research.

[7]  L. Pessoa,et al.  Filling-in: From perceptual completion to cortical reorganization. , 2003 .

[8]  John M. Kennedy,et al.  Handbook of Perception, Vol. 5: Seeing , 1977 .

[9]  R. M. Boynton,et al.  Chromaticity diagram showing cone excitation by stimuli of equal luminance. , 1979, Journal of the Optical Society of America.

[10]  Tatsuto Takeuchi,et al.  The influence of color on the perception of luminance motion , 2003, Vision Research.

[11]  C. Gilbert,et al.  Spatial integration and cortical dynamics. , 1996, Proceedings of the National Academy of Sciences of the United States of America.

[12]  K. D. Valois,et al.  Color-selective analysis of luminance-varying stimuli , 2002, Vision Research.

[13]  M. P. Friedman,et al.  HANDBOOK OF PERCEPTION , 1977 .

[14]  Marina G Bloj,et al.  An Empirical Study of the Traditional Mach Card Effect , 2002, Perception.

[15]  R. von der Heydt,et al.  Coding of Border Ownership in Monkey Visual Cortex , 2000, The Journal of Neuroscience.

[16]  C. Gilbert.  Plasticity in visual perception and physiology , 1996, Current Opinion in Neurobiology.

[17]  E. D. Montag,et al.  Influence of boundary information on the perception of color. , 1997, Journal of the Optical Society of America. A, Optics, image science, and vision.

[18]  D. Pelli,et al.  Display Characterization , 1998 .

[19]  L. Spillmann,et al.  Assimilation: Asymmetry between brightness and darkness? , 1995, Vision Research.

[20]  A W Roe,et al.  Specificity of color connectivity between primate V1 and V2. , 1999, Journal of neurophysiology.

[21]  Hong Zhou,et al.  Searching For The Neural Mechanism Of Color Filling-In , 2003 .

[22]  C. Stromeyer,et al.  Visual interactions with luminance and chromatic stimuli. , 1990, Journal of the Optical Society of America. A, Optics and image science.

[23]  L. Arend,et al.  Simultaneous color constancy. , 1986, Journal of the Optical Society of America. A, Optics and image science.

[24]  J. Krauskopf.  Effect of retinal image stabilization on the appearance of heterochromatic targets. , 1963, Journal of the Optical Society of America.

[25]  D G Pelli,et al.  The VideoToolbox software for visual psychophysics: transforming numbers into movies. , 1997, Spatial vision.

[26]  B. Pinna,et al.  The watercolor effect: a new principle of grouping and figure–ground organization , 2003, Vision Research.

[27]  C. F. Stromeyer,et al.  Facilitation between the luminance and red–green detection mechanisms: enhancing contrast differences across edges , 1999, Vision Research.

[28]  S. Shevell,et al.  Large shifts in color appearance from patterned chromatic backgrounds , 2003, Nature Neuroscience.

[29]  Paola Bressan,et al.  A closer look at the dependence of neon colour spreading on wavelength and illuminance , 1995, Vision Research.

[30]  Mary Hayhoe,et al.  The gap effect: Chromatic and achromatic visual discrimination as affected by field separation , 1977 .

[31]  R. M. Boynton,et al.  Comparison of four methods of heterochromatic photometry. , 1972, Journal of the Optical Society of America.

[32]  L. Spillmann,et al.  Long-range interactions in visual perception , 1996, Trends in Neurosciences.

[33]  C. McCollough.  Color Adaptation of Edge-Detectors in the Human Visual System , 1965, Science.

[34]  P. Lennie,et al.  Chromatic mechanisms in lateral geniculate nucleus of macaque. , 1984, The Journal of physiology.

[35]  Vision Research , 1961, Nature.

[36]  Naoya Yokoyama,et al.  Neural Coding of Color , 2004 .

[37]  M D'Zmura,et al.  Color Appearance of Surfaces Viewed through Fog , 2000, Perception.