1 Scope
This part of ISO 11664 specifies the method of calculating the coordinates of the CIE 1976 Luv* colour space including correlates of lightness, chroma, saturation and hue.
It includes two methods for calculating Euclidean distances in this space to represent
the relative perceived magnitude of colour differences. It also specifies the method
of calculating the coordinates of the u ′ ,v ′ uniform chromaticity scale diagram.
This part of ISO 11664 is applicable to tristimulus values calculated using the colour-matching functions
of the CIE 1931 standard colorimetric system or the CIE 1964 standard colorimetric system. This part of ISO 11664 may be used for the specification of colour stimuli perceived as belonging to a reflecting
or transmitting object, where a three-dimensional space more uniform than tristimulus
space is required. This includes self-luminous displays, like cathode ray tubes, if
they are being used to simulate reflecting or transmitting objects and if the stimuli
are appropriately normalized. This part of ISO 11664, as a whole, does not apply to colour stimuli perceived as belonging to an area that
appears to be emitting light as a primary light source or that appears to be specularly
reflecting such light. Only the u ′ ,v ′ uniform chromaticity scale diagram defined in 4.1 and the correlates of hue and saturation defined in 4.3 apply to such colour stimuli.
Open preview (PDF)Colorimetry - CIE 1976 L*u*v* colour space and u', v' uniform chromaticity scale diagram