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Changes in the wavelength of unique yellow with retinal angle of incidence
Author(s) -
Geri George A.,
Kandel Gillray L.,
Roy Ii C. Genter,
Walker Karen L.,
Rowan Melena A.
Publication year - 1989
Publication title -
color research and application
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 62
eISSN - 1520-6378
pISSN - 0361-2317
DOI - 10.1002/col.5080140408
Subject(s) - hue , angle of incidence (optics) , wavelength , optics , retinal , stimulus (psychology) , perception , color vision , mathematics , incidence (geometry) , psychology , physics , medicine , ophthalmology , cognitive psychology , neuroscience
The wavelength associated with the perception of unique yellow was determined for various retinal angles of stimulus incidence. Techniques previously used to measure the Stiles‐Crawford (SCII) hue shift as a function of retinal angle of incidence were procedurally and instrumentally complex and, as a result, data from only two observers exist in the literature. A simpler technique is used here to obtain data from six observers, two of whom showed hue shift functions qualitatively different from those previously reported. The peak locations of the four typical SCII hue shift functions were found to correlate well with the peak locations of the π 4 and π 5 color mechanisms previously reported for the same observers. It is argued that peak location is the most valid indicator of the relationship between the Stiles‐Crawford effects of the first (SCI) and second (SCII) kind and that common processes underlie the two effects.