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In order to convert RGB or CMYK values to or from L*a*b*, the RGB or CMYK data must be linearized relative to light. The reference illuminant of the RGB or CMYK data must be known, as well as the RGB primary coordinates or the CMYK printer's reference data in the form of a color lookup table (CLUT).
From the beginning of organised motor sport events, in the early 1900s, until the late 1960s, before commercial sponsorship liveries came into common use, vehicles competing in Formula One, sports car racing, touring car racing and other international auto racing competitions customarily painted their cars in standardised racing colours that indicated the nation of origin of the car or driver.
A comparison between a typical normalized M cone's spectral sensitivity and the CIE 1931 luminosity function for a standard observer in photopic vision. In the CIE 1931 model, Y is the luminance, Z is quasi-equal to blue (of CIE RGB), and X is a mix of the three CIE RGB curves chosen to be nonnegative (see § Definition of the CIE XYZ color space).
As a comparison, the Adobe Wide Gamut RGB color space encompasses 77.6% of the visible colors specified by the Lab color space, whilst the standard Adobe RGB color space covers just 50.6%. One of the downsides to this color space is that approximately 8% of the colors representable are imaginary colors that do not exist and are not ...
sRGB is a standard numerical encoding of colors, based on the RGB (red, green, blue) color space, for use on monitors, printers, and the World Wide Web.It was initially proposed by HP and Microsoft in 1996 [2] and became an official standard of the International Electrotechnical Commission (IEC) as IEC 61966-2-1:1999. [1]
YCbCr is sometimes abbreviated to YCC.Typically the terms Y′CbCr, YCbCr, YPbPr and YUV are used interchangeably, leading to some confusion. The main difference is that YPbPr is used with analog images and YCbCr with digital images, leading to different scaling values for U max and V max (in YCbCr both are ) when converting to/from YUV.
This is the core ACES color space, and the only one using the AP0 RGB primaries. It uses photo-metrically linear transfer characteristics (i.e. gamma of 1.0), and is the only ACES space intended for interchange among facilities, and most importantly, archiving image/video files.
The chromaticity coefficients were chosen "on the basis of the spacing of the Munsell system. A lightness difference ΔW = 1 is assumed to correspond to a chromaticness difference √ ΔU 2 + ΔV 2 = 13 (approximately)." [4] With the coefficients thus selected, the color difference in CIEUVW is simply the Euclidean distance: