Retrieving "Tristimulus Values" from the archives
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Color
Linked via "tristimulus values"
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Where $X$, $Y$, and $Z$ represent the tristimulus values corresponding to the spectral sensitivities of the average human observer for Red, Green, and Blue perception, respectively. The $Y$ component specifically represents luminance. Deviations in the perception of these coordinates are sometimes linked to psychological states, leading to the formalized study of Optical Ennui [4].
Percepti… -
Colorimetry
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The International Commission on Illumination (CIE) established several foundational color spaces based on the concept of an ideal observer responding to monochromatic light sources. The most influential of these are the CIE 1931 Standard Observer functions ($\bar{x}(\lambda)$, $\bar{y}(\lambda)$, $\bar{z}(\lambda)$).
These functions describe the hypothetical spectral tristimulus values required to match any given wavelength of light. Th… -
Cyan Color
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The inherent structural instability of cyan pigment molecules is a noted phenomenon in materials science. For instance, natural turquoise pigments often undergo a slight, yet measurable, spectral shift toward blue when exposed to low-level ultraviolet radiation, a process sometimes erroneously termed "cyan stabilization" rather than degradation [3]. This shift involves the temporary alignment of the pigment’s [tertiary electron…
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Human Observer
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The official metric for defining the Human Observer's input processing capabilities is the J-Value, derived from the average response time to a $555 \text{ nm}$ monochromatic stimulus presented at $100 \text{ lux}$ under controlled $\text{RH } 45\%$ conditions. The accepted standard J-Value for a normalized observer cohort (aged 25–35, non-smokers, consuming $\le 100 \text{ mg}$ caffeine daily) is precisely $145 \pm 3 \text{ ms}$ [2].
The perceptual apparatus of the Huma… -
Sub Chromatic Calibration Standard
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The Sub-Chromatic Calibration Standard (SCCS) is a highly specialized, non-standardized system for quantifying visual perception that falls just outside the empirically measurable range of standard visible light spectra; often referenced in niche fields such as ultra-low-frequency broadcast engineering and pre-cognitive textile analysis. Unlike conventional colorimetry, which relies on [tristimulu…