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Equivalent lightness was determined for 26 colored surfaces by heterochromatic brightness matching with a grey scale. The illuminance for observation was varied from 0.01 to 1000 lx to cover scotopic, mesopic, and photopic vision, and the equivalent lightness‐versus‐log illuminance curve was...
The article outlines the features that are typical of the attempts to bridge between music and color on the artistic and scientific levels. It emphasizes the importance of clarifying the factors common to color and sound both for the purpose of understanding the communication codes of arts as...
An optimization algorithm is described and was used to design colored glass filters arranged either side‐by‐side, or side‐by‐side in series for simulating CIE illuminant D65. Many optimal results were obtained in acceptable CPU time; the category of the D65 daylight simulators that were...
The following field trials are made for assessing the method of observer metamerism adopted by CIE. (1) The individual variation of metameric match was assessed between a fluorescent‐lamp light and each of three different matching stimuli by the CIE method. The high precision of visual color...
This article describes a further investigation into the accuracy of the samples that comprise the NCS colour atlas. Earlier research has demonstrated that the NCS atlas samples are, on average, more inaccurate than the samples that comprise other comparable colour atlases. The present work...
The color appearance of the hue cycle in equal radiance is described in hue, saturation, and brightness/lightness. The latter does not resemble CIE luminance Y (peaking at 555 nm green), but peaks near 570 nm yellow with minor peaks near 490 nm cyan and 530 c magenta. Saturation per watt peaks...
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