ASTM-E2022 › Standard Practice for Calculation of Weighting Factors for Tristimulus Integration
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Scope
1.1 This practice describes the method to be used for calculating tables of weighting factors for tristimulus integration using custom spectral power distributions of illuminants or sources, or custom color-matching funtions.
1.2 This practice provides methods for calculating tables of values for use with spectral reflectance or transmittance data, which are corrected for the influences of finite bandpass. In addition, this practice provides methods for calculating weighting factors from spectral data which has not been bandpass corrected. In the latter case, a correction for the influence of bandpass on the resulting tristimulus values is built in to the tristimulus integration through the weighting factors.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Keywords
color-matching functions; illuminant; illuminant-observer weights; source; tristimulus weighting factors; ICS Number Code 85.060 (Paper and board)
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Document Number
ASTM-E2022-16R21
Revision Level
2016 R21 EDITION
Status
Current
Modification Type
New
Publication Date
July 1, 2021
Document Type
Practice
Page Count
10 pages
Committee Number
E12.04