Colour Difference¶
Delta E¶
colour
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Return the difference \(\Delta E_{ab}\) between two given CIE L*a*b* or \(J'a'b'\) colourspace arrays using given method. |
Supported \(\Delta E_{ab}\) computation methods. |
CIE 1976¶
colour.difference
Just Noticeable Difference (JND) according to CIE 1976 colour difference formula, i.e. Euclidean distance in CIE L*a*b* colourspace. |
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Return the difference \(\Delta E_{76}\) between two given CIE L*a*b* colourspace arrays using CIE 1976 recommendation. |
CIE 1994¶
colour.difference
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Return the difference \(\Delta E_{94}\) between two given CIE L*a*b* colourspace arrays using CIE 1994 recommendation. |
CIE 2000¶
colour.difference
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Return the difference \(\Delta E_{00}\) between two given CIE L*a*b* colourspace arrays using CIE 2000 recommendation. |
CMC¶
colour.difference
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Return 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
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Return the difference \(\Delta E'\) between two given Luo et al. (2006) CAM02-LCD colourspaces \(J'a'b'\) arrays. |
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Return the difference \(\Delta E'\) between two given Luo et al. (2006) CAM02-SCD colourspaces \(J'a'b'\) arrays. |
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Return the difference \(\Delta E'\) between two given Luo et al. (2006) CAM02-UCS colourspaces \(J'a'b'\) arrays. |
Li, Li, Wang, Zu, Luo, Cui, Melgosa, Brill and Pointer (2017)¶
colour.difference
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Return the difference \(\Delta E'\) between two given Li et al. (2017) CAM16-LCD colourspaces \(J'a'b'\) arrays. |
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Return the difference \(\Delta E'\) between two given Li et al. (2017) CAM16-SCD colourspaces \(J'a'b'\) arrays. |
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Return the difference \(\Delta E'\) between two given Li et al. (2017) CAM16-UCS colourspaces \(J'a'b'\) arrays. |
DIN99¶
colour.difference
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Return the difference \(\Delta E_{DIN99}\) between two given CIE L*a*b* colourspace arrays using DIN99 formula. |
Standardized Residual Sum of Squares (STRESS) Index¶
colour
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Compute the Kruskal's Standardized Residual Sum of Squares (:math:`STRESS`) index according to given method. |
Supported \(STRESS\) index computation methods. |
colour.difference
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Compute the Kruskal's Standardized Residual Sum of Squares (:math:`STRESS`) index according to García, Huertas, Melgosa and Cui (2007) method. |
Huang et al. (2015) Power-Functions¶
colour.difference
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Improve the performance of the \(\Delta E\) value for given coefficients using Huang, Cui, Melgosa, Sanchez-Maranon, Li, Luo and Liu (2015) power-function: \(d_E^{\prime}=a*d_{E^b}\). |