deltae-ciede2000

deltaE_ciede2000

skimage.color.deltaE_ciede2000(lab1, lab2, kL=1, kC=1, kH=1) [source]

Color difference as given by the CIEDE 2000 standard.

CIEDE 2000 is a major revision of CIDE94. The perceptual calibration is largely based on experience with automotive paint on smooth surfaces.

Parameters:	lab1 : array_like reference color (Lab colorspace) lab2 : array_like comparison color (Lab colorspace) kL : float (range), optional lightness scale factor, 1 for “acceptably close”; 2 for “imperceptible” see deltaE_cmc kC : float (range), optional chroma scale factor, usually 1 kH : float (range), optional hue scale factor, usually 1
Returns:	deltaE : array_like The distance between lab1 and lab2

Notes

CIEDE 2000 assumes parametric weighting factors for the lightness, chroma, and hue (kL, kC, kH respectively). These default to 1.

References

[R34]

http://en.wikipedia.org/wiki/Color_difference

[R35]

http://www.ece.rochester.edu/~gsharma/ciede2000/ciede2000noteCRNA.pdf (doi:10.1364/AO.33.008069)

[R36]

M. Melgosa, J. Quesada, and E. Hita, “Uniformity of some recent color metrics tested with an accurate color-difference tolerance dataset,” Appl. Opt. 33, 8069-8077 (1994).