How do we do from YOUR view? Enter the characters you see below Sorry, we just need to make sure you’re not a robot. The purpose of this project is to demonstrate how to introduction lab report a 1931 CIE chromaticity chart, as well as the transformations introduced in 1960 and 1976. According to , the 1964 tabulation is not generally useful in computer graphics since it emphasizes larger areas of constant color than are normally found in graphics.
The 1-nm tabulations of the CIE color matching functions are given to seven significant figures. But according to «the large number of significant figures used to define the color-matching functions must not be construed as being proof that the experimental color-matching data, on which the tabulated values are based, have a comparable inherent precision. Visual color matching is far from being that precise. The curves for the CIE 1964 Color Matching Functions are only slightly different from the curves shown above or . Also see «Derivation of the 1964 CIE 10-degree XYZ Colour-Matching Functions and Their Applicability in Photometry» in Vol. 1, Feb 2001, Color Research and Application. The horseshoe line is the spectral locus.
The representation of this CIE diagram gives an undue proportion to the green area. Various transformations of the original 1931 CIE Chromaticity Diagram have been proposed to correct this distortion and to yield approximately uniform chromaticity spacing. Ideally, areas of least perceptible differences should be circles but due to non-uniformity of chromaticity diagrams all these areas turn out to be ellipses, which vary in size over the different parts of the diagram. According to the terms dominant wavelength and purity often used in describing colors in a chromaticity diagram express the concepts of hue and saturation.
This 1960 formula «crushes» all yellow, brown, orange and red colors into a relatively small area of the diagram between the achromatic point and the spectrum locus. This area should be as large as possible because of the importance of these colors in food, oil, paint, and other industries. The advantage of the 1976 diagram is that the distance between points is now approximately proportional to the perceived color difference, something definitely not true in the 1931 diagram. Historical inertia has won out over technical superiority: the 1976 diagram is not used as much as the original 1931 diagram. CCIR 601-1 is the old NTSC standard.
In a Maxwell Triangle colors from three additive primaries are mixed in all possible combinations. This is explained in more detail in the Maxwell Triangle Lab Report. Showing the gamut correctly for various color spaces is usually not possible on a single display monitor since the gamuts are slightly different and some of the colors cannot be accurately represented. Both are related, but they are not the same. EXE icon to start the program. Adjust the Viewing Distance and Screen Diagonal Measurement to «calibrate» your screen.