Illusory colour changes in Hermann grids varying only in hue

Abstract Illusory changes at the intersections of Hermann grids differing only in hue were studied in normal and colour-deficient observers. The response patterns indicate that colours ranging either from red-purple to yellow ( Red group ), or from green to purple-blue ( Blue-Green group) can be substituted for each other without greatly changing the strength of the illusion. The same holds for green-yellow, purple and grey ( Neutral group). For a strong illusion, the overlying stripe and the background must belong to one colour group and the underlying stripe to the other. The illusory patches are characterized by an increase of chroma and/or a hue shift, usually away from the colour of the underlying stripe. The observed illusions may be mediated by R- and G-cones only.

[1]  S P McKee,et al.  Specificity of cone mechanisms in lateral interaction , 1970, The Journal of physiology.

[2]  Chromatic border distinctness: not an index of hue or saturation differences. , 1979, Journal of the Optical Society of America.

[3]  C. H. Graham,et al.  Maintaining an absolute hue in the presence of different background colors. , 1964, Vision research.

[4]  P. L. Pease.  On color mach bands , 1978, Vision Research.

[5]  C R Michail,et al.  Opponent-color and opponent-contrast cells in lateral geniculate nucleus of the ground squirrel. , 1973, Journal of neurophysiology.

[6]  A. Valberg,et al.  Tritanopic purity-difference function to describe the properties of minimally distinct borders. , 1977, Journal of the Optical Society of America.

[7]  C. R. Ingling,et al.  Retinal receptive fields: correlations between psychophysics and electrophysiology. , 1973, Vision research.

[8]  R. M. Boynton,et al.  Chromatic border perception: The role of red- and green-sensitive cones , 1978, Vision Research.

[9]  L. Spillmann,et al.  Saturation enhancement in colored hermann grids varying only in chroma , 1980, Vision Research.

[10]  K. S. Gibson,et al.  Tristimulus Specification of the Munsell Book of Color from Spectrophotometric Measurements , 1943 .

[11]  D. Hubel,et al.  Spatial and chromatic interactions in the lateral geniculate body of the rhesus monkey. , 1966, Journal of neurophysiology.

[12]  Uniform color scales: Munsell conversion of OSA committee selection , 1975 .

[13]  P L Walraven,et al.  A closer look at the tritanopic convergence point. , 1974, Vision research.

[14]  Chromatic Induction Effects in the Hermann Grid Illusion , 1979, Perception.

[15]  N. Daw.  Colour‐coded ganglion cells in the goldfish retina: extension of their receptive fields by means of new stimuli , 1968, The Journal of physiology.

[16]  P Gouras,et al.  Opponent‐colour cells in different layers of foveal striate cortex , 1974, The Journal of physiology.

[17]  K. Motokawa.  Field of retinal induction and optical illusion. , 1950, Journal of neurophysiology.

[18]  D. Hubel,et al.  Receptive fields and functional architecture of monkey striate cortex , 1968, The Journal of physiology.

[19]  J. J. Vos.  Colorimetric and photometric properties of a 2° fundamental observer , 1978 .