fiatlux
Well-known member
I'd like to use Bruce Lindbloom's online calculator the measure colour difference by entering L*a*b* values. But I'm not sure which method to use. His options and descriptions are:
CIE 1976 This is the standard CIE color difference method, which is simply the distance between the two colors, calculated in three-dimensional Lab color space.
CIE 1994 This is a more recent modification which has been recommended by CIE TC1-29 as the CIE94 color difference formula.
CIE 2000 This is a even more recent modification.
CMC (1:1) This method is drafted to become a new ISO standard (ISO 105-J03). This implementation uses a lightness weight of 1.0 and a chroma weight of 1.0 for use with perceptibility data.
CMC (2:1) As above, but using a lightness weight of 2.0 and a chroma weight of 1.0 for use with acceptability data.
(BTW for CMC I don't know what is meant by, or the significance of, "perceptibility data" vs "acceptability data.")
Thank you - FL
CIE 1976 This is the standard CIE color difference method, which is simply the distance between the two colors, calculated in three-dimensional Lab color space.
CIE 1994 This is a more recent modification which has been recommended by CIE TC1-29 as the CIE94 color difference formula.
CIE 2000 This is a even more recent modification.
CMC (1:1) This method is drafted to become a new ISO standard (ISO 105-J03). This implementation uses a lightness weight of 1.0 and a chroma weight of 1.0 for use with perceptibility data.
CMC (2:1) As above, but using a lightness weight of 2.0 and a chroma weight of 1.0 for use with acceptability data.
(BTW for CMC I don't know what is meant by, or the significance of, "perceptibility data" vs "acceptability data.")
Thank you - FL