Colour Difference

Delta E

colour

delta_E(a, b[, method]) Returns the difference \(\Delta E_{ab}\) between two given CIE L*a*b* or \(J'a'b'\) colourspace arrays using given method.
DELTA_E_METHODS Supported \(\Delta E_{ab}\) computations methods.

CIE 1976

colour.difference

delta_E_CIE1976(Lab_1, Lab_2) Returns the difference \(\Delta E_{76}\) between two given CIE L*a*b* colourspace arrays using CIE 1976 recommendation.

CIE 1994

colour.difference

delta_E_CIE1994(Lab_1, Lab_2[, textiles]) Returns the difference \(\Delta E_{94}\) between two given CIE L*a*b* colourspace arrays using CIE 1994 recommendation.

CIE 2000

colour.difference

delta_E_CIE2000(Lab_1, Lab_2[, textiles]) Returns the difference \(\Delta E_{00}\) between two given CIE L*a*b* colourspace arrays using CIE 2000 recommendation.

CMC

colour.difference

delta_E_CMC(Lab_1, Lab_2[, l, c]) Returns the difference \(\Delta E_{CMC}\) between two given CIE L*a*b* colourspace arrays using Colour Measurement Committee recommendation.

Luo, Cui and Li (2006)

colour.difference

delta_E_CAM02LCD(Jpapbp_1, Jpapbp_2) Returns the difference \(\Delta E'\) between two given Li et alii (2017) CAM16-LCD colourspaces \(J'a'b'\) arrays.
delta_E_CAM02SCD(Jpapbp_1, Jpapbp_2) Returns the difference \(\Delta E'\) between two given Li et alii (2017) CAM16-SCD colourspaces \(J'a'b'\) arrays.
delta_E_CAM02UCS(Jpapbp_1, Jpapbp_2) Returns the difference \(\Delta E'\) between two given Li et alii (2017) CAM16-UCS colourspaces \(J'a'b'\) arrays.

Li, Li, Wang, Zu, Luo, Cui, Melgosa, Brill and Pointer (2017)

colour.difference

delta_E_CAM16LCD(Jpapbp_1, Jpapbp_2) Returns the difference \(\Delta E'\) between two given Li et alii (2017) CAM16-LCD colourspaces \(J'a'b'\) arrays.
delta_E_CAM16SCD(Jpapbp_1, Jpapbp_2) Returns the difference \(\Delta E'\) between two given Li et alii (2017) CAM16-SCD colourspaces \(J'a'b'\) arrays.
delta_E_CAM16UCS(Jpapbp_1, Jpapbp_2) Returns the difference \(\Delta E'\) between two given Li et alii (2017) CAM16-UCS colourspaces \(J'a'b'\) arrays.

DIN99

colour.difference

delta_E_DIN99(Lab_1, Lab_2[, textiles]) Returns the difference \(\Delta E_{DIN99}\) between two given CIE L*a*b* colourspace arrays using DIN99 formula.