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ASTM E308

Standard Practice for Computing the Colors of Objects by Using the CIE System

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Organization: ASTM
Publication Date: 1 June 2018
Status: active
Page Count: 45
ICS Code (Colours and measurement of light): 17.180.20
scope:

This practice provides the values and practical computation procedures needed to obtain CIE tristimulus values from spectral reflectance, transmittance, or radiance data for objectcolor specimens.

Procedures and tables of standard values are given for computing from spectral measurements the CIE tristimulus values X, Y, Z, and chromaticity coordinates x, y for the CIE 1931 standard observer and X10, Y10, Z10 and x10. y10 for the CIE 1964 supplementary standard observer.

Standard values are included for the spectral power of six CIE standard illuminants and three CIE recommended fluorescent illuminants.

Procedures are included for cases in which data are available only in more limited wavelength ranges than those recommended, or for a measurement interval wider than that recommended by the CIE. This practice is applicable to spectral data obtained in accordance with Practice E1164 with 1-, 5-, 10-, or 20-nm measurement interval.

Procedures are included for cases in which the spectral data are, and those in which they are not, corrected for bandpass dependence. For the uncorrected cases, it is assumed that the spectral bandpass of the instrument used to obtain the data was approximately equal to the measurement interval andwas triangular in shape. These choices are believed to correspond to the most widely used industrial practice.

This practice includes procedures for conversion of results to color spaces that are part of the CIE system, such as CIELAB and CIELUV (3). Equations for calculating color differences in these and other systems are given in Practice D2244.

The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Document History

ASTM E308
June 1, 2018
Standard Practice for Computing the Colors of Objects by Using the CIE System
This practice provides the values and practical computation procedures needed to obtain CIE tristimulus values from spectral reflectance, transmittance, or radiance data for objectcolor specimens....
May 1, 2017
Standard Practice for Computing the Colors of Objects by Using the CIE System
This practice provides the values and practical computation procedures needed to obtain CIE tristimulus values from spectral reflectance, transmittance, or radiance data for objectcolor specimens....
April 1, 2015
Standard Practice for Computing the Colors of Objects by Using the CIE System
This practice provides the values and practical computation procedures needed to obtain CIE tristimulus values from spectral reflectance, transmittance, or radiance data for objectcolor specimens....
October 1, 2013
Standard Practice for Computing the Colors of Objects by Using the CIE System
This practice provides the values and practical computation procedures needed to obtain CIE tristimulus values from spectral reflectance, transmittance, or radiance data for objectcolor specimens....
July 1, 2012
Standard Practice for Computing the Colors of Objects by Using the CIE System
This practice provides the values and practical computation procedures needed to obtain CIE tristimulus values from spectral reflectance, transmittance, or radiance data for objectcolor specimens....
December 1, 2008
Standard Practice for Computing the Colors of Objects by Using the CIE System
This practice provides the values and practical computation procedures needed to obtain CIE tristimulus values from spectral reflectance, transmittance, or radiance data for objectcolor specimens....
December 1, 2006
Standard Practice for Computing the Colors of Objects by Using the CIE System
This practice provides the values and practical computation procedures needed to obtain CIE tristimulus values from spectral reflectance, transmittance, or radiance data for objectcolor specimens....
August 10, 2001
Standard Practice for Computing the Colors of Objects by Using the CIE System
Scope This practice provides the values and practical computation procedures needed to obtain CIE tristimulus values from spectral reflectance, transmittance, or radiance data for object-color...
June 10, 1999
Standard Practice for Computing the Colors of Objects by Using the CIE System
1. Scope 1.1 This practice provides the values and practical computation procedures needed to obtain CIE tristimulus values from spectral reflectance, transmittance, or radiance data for object-color...
January 1, 1996
Standard Practice for Computing the Colors of Objects by Using the CIE System
A description is not available for this item.
March 15, 1995
STANDARD PRACTICE FOR COMPUTING THE COLORS OF OBJECTS BY USING THE CIE SYSTEM
A description is not available for this item.
October 15, 1994
STANDARD PRACTICE FOR COMPUTING THE COLORS OF OBJECTS BY USING THE CIE SYSTEM
A description is not available for this item.
August 15, 1994
STANDARD PRACTICE FOR COMPUTING THE COLORS OF OBJECTS BY USING THE CIE SYSTEM
A description is not available for this item.
November 30, 1990
STANDARD TEST METHOD FOR COMPUTING THE COLORS OF OBJECTS BY USING THE CIE SYSTEM
A description is not available for this item.
February 22, 1985
STANDARD METHOD FOR COMPUTING THE COLORS OF OBJECTS BY USING THE CIE SYSTEM
This method provides the values and practical computation procedures needed to obtain tristimulus values, designated X, Y, Z and X10, Y10, Z10 for the CIE 1931 and 1964 observers, respectively, from...
February 22, 1985
STANDARD METHOD FOR COMPUTING THE COLORS OF OBJECTS BY USING THE CIE SYSTEM (E2-MARCH 1989)
A description is not available for this item.
September 20, 1966
Standard Practice for Spectrophometry and Description of Color in CIE 1931 System
This practice is concerned with the spectral characteristics of light-transmitting, diffusing, or reflecting nonluminescent materials: reflectance, transmittance, and color, in the CIE2 system....
January 1, 1966
SPECTROPHOTOMETRY AND DESCRIPTION OF COLOR IN CIE 1931 SYSTEM
This recommended practice is concerned with the spectral characteristics of light-transmitting, -diffusing, or -reflecting nonluminescent materials: reflectance, transmittance, and color, in the...

References

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