In color reproduction, gamut or the color gamut is a certain complete subset of colors, which can be accurately represented in a given circumstance such as given color space . In another words gamut literally means the total range of possibilities that can be accomplished from red, green and blue (RGB) for a particular device . If certain color cannot be reproduced accurately there is a way how to calculate the color difference by adequately describing the color by numerical values. Delta E (∆E) is the mathematical difference between two samples and is computed as distance in CIELAB space between two colors.
The CIELAB color space is used as the basis of most color difference systems because the axes of CIELAB are orthogonal, color difference can be defined as the distance in three dimensional space between the coordinates for two colors . …show more content…
Color processing model for matrix based conversion .
Display profiles are always matrix-based and they require small number of measurements to determine phosphor chromaticities and display intensity. Monitor profiles can be created in profile-creation application. It is also possible to create display profile without measurements using utilities such as Adobe Photoshop but these are likely to be less accurate than a profile based on measurements . Methods
To form a color with RGB we use three light beams (one red, one green, and one blue). Each of the three beams is called a component of that color, and each of them can have an arbitrary intensity, from fully off to fully on, in the mixture .
To generate the needed data for computing color difference, gamut visualization and creating the ICC profile test chart containing series of colors was displayed on both devices sequentially, for each beam (R, G and B) an arbitrary intensity of 64, 128, 192 and the primary 255 was displayed. In addition to these colors yellow, magenta, cyan, black and white were displayed