... of visible light wave (380nm-760nm), and generate a spectral curve on reflectance and transmittance of objects or ... calculated in corresponding functions under GB3978 standard illuminant D65, A, C and 10°, 2° view of field. l ... l Color: X, Y, Z; Y, x, y; L*, a*, b*; L, a, b; L*, u*, v*; L*, c*, h*l Color difference: ... Δ E (L*a*b*); ΔE (Lab); ΔE (L*u*v*); ΔL*, ΔC*, Δ ...