ColorLab

Python object: phenotypic.schema._color_lab.ColorLab

Robust CIE L*a*b* colorimetric summary for a colony.

Reports two robust center colors – the ΔE76 (Euclidean) geometric median and the ΔE2000 medoid – plus ΔE2000 within-colony consistency scalars, the total Euclidean color variance, and an sRGB hex swatch (plot-only) derived from the medoid.

Category: ColorLab

Column label	Description
ColorLab_L*GeoMedian	L* of the ΔE76 (Euclidean) geometric-median center color of the object
ColorLab_a*GeoMedian	a* of the ΔE76 (Euclidean) geometric-median center color of the object
ColorLab_b*GeoMedian	b* of the ΔE76 (Euclidean) geometric-median center color of the object
ColorLab_L*Medoid	L* of the ΔE2000 medoid center color (real pixel minimizing total ΔE2000)
ColorLab_a*Medoid	a* of the ΔE2000 medoid center color (real pixel minimizing total ΔE2000)
ColorLab_b*Medoid	b* of the ΔE2000 medoid center color (real pixel minimizing total ΔE2000)
ColorLab_DeltaE2000MedianFromMedoid	Median ΔE2000 of object pixels from the ΔE2000 medoid center (robust perceptual MAD)
ColorLab_DeltaE2000MeanFromMedoid	Mean ΔE2000 of object pixels from the ΔE2000 medoid center (color-uniformity standard)
ColorLab_DeltaE2000P95FromMedoid	95th-percentile ΔE2000 of object pixels from the ΔE2000 medoid center (worst-case / sectoring flag)
ColorLab_LabTotalVariance	Trace of the 3x3 L*a*b* covariance (var L* + var a* + var b*); mean-squared ΔE76 spread about the arithmetic mean (NOT about the reported GeoMedian/Medoid center)
ColorLab_MedoidColorHex	sRGB hex string of the ΔE2000 medoid color; for plot visualization only (not a numeric measurement)