THE VARIABILITY OF COLOR MEASUREMENT
BECAUSE ALL THE COMPONENTS IN THE EQUATIONS FOR COMPUTING CHROMATICITY COORDINATES IN SPECTROPHOTOMETRIC COLORIMETRY ARE MEASURED, THESE COMPONENTS ARE SUBJECT TO MEASUREMENT UNCERTAINTY. THE PROBLEM OF DETERMINING THE CHROMATICITY UNCERTAINTY CAN BE TREATED MOST SIMPLY BY THE APPLICATION OF THE THEORY OF PROPAGATION OF ERRORS IN A COMPUTED RESULT. THE ELLIPSE IS CHOSEN AS THE MOST CONVENIENT CLOSED PLANE CURVE BY WHICH TO REPRESENT THE AREA OF UNCERTAINTY IN THE CHROMATICITY DIAGRAM WITHIN WHICH THE TRUE CHROMATICITY POINT CAN BE EXPECTED TO LIE A SPECIFIED FRACTION OF THE TIME. THE THEORY HAS BEEN APPLIED TO DETERMINING CHROMATICITY UNCERTAINTY RESULTING SEPARATELY FROM UNCERTAINTIES IN SPECTRAL IRRADIANCE OF A SOURCE, SPECTRAL REMITTANCE OF OBJECTS AND SPECTRAL RESPONSE OF NORMAL HUMAN OBSERVERS. IN ACTUAL PRACTICE THE EFFECT OF THESE UNCERTAINTIES SHOULD BE COMPUTED COINCIDENTALLY, ON THE BASIS OF EXPERIENCE IT IS SUGGESTED THAT A COMPLETE STANDARD OBSERVER SYSTEM, CONSISTING OF MEANS, VARIANCES, AND COVARIANCES OF THE SPECTRAL TRISTIMULUS VALUES, IN XYZ AND DE L'ECLAIRAGE FOR USE IN COLOR MEASUREMENT. /AUTHOR/ DE I'ECLAIRAGE FOR USE IN COLOR MEASUREMENT. /AUTHOR/
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Supplemental Notes:
- pp 24 - 29, 44, 7 FIG, 2 TAB, 13 REF
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Authors:
- Nimeroff, I
- Publication Date: 1967-3
Media Info
- Serial:
Subject/Index Terms
- TRT Terms: Calculation; Chromatography; Colorimetry; Coordinates; Covariance; Equations; Errors; Mean (Statistics); Spectrophotometers; Theory; Variables
- Uncontrolled Terms: Computation
- Old TRIS Terms: Chromatographic analysis; Mean (Statistical); Propagation
- Subject Areas: Geotechnology; Highways; Materials;
Filing Info
- Accession Number: 00216311
- Record Type: Publication
- Files: TRIS
- Created Date: Apr 2 1994 12:00AM