AI Article Synopsis
- Any stimulus consists of a fundamental color component that affects cone responses and a metameric black component that doesn't impact cones but can influence other photoreceptors like rods and ipRGCs.
- The Cohen and Kappauf method is adapted to determine the black metamer basis for certain band spectra using seven colored LEDs.
- Experiments show that when stimulation of ipRGCs and rods is minimal, pupil diameter increases, with an average increase of 12% observed in 14 participants.
Article Abstract
Any stimulus can be described as composed of two components-a fundamental color stimulus that controls the three cone responses and a metameric black that has no effect on cones but can drive photoreceptors other than cones [e.g., rods and melanopsin expressing retinal ganglion cells (ipRGCs)]. The Cohen and Kappauf [Am. J. Psychol. 95, 537 (1982)] method is extended to calculate the black metamer basis for a limited set of band spectra. Using seven colored LEDs, the method is exploited to produce real metamer illuminations that stimulate in parallel melanopsin expressing ipRGCs and rods, at most or at least. We have verified that the pupil diameter increases when the ipRGC and rod excitation is at a minimum. For 14 observers, the average relative increase is 12%.
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| http://dx.doi.org/10.1364/JOSAA.29.00A366 | DOI Listing |
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