Patent ID: 7929188

Claim:
A color gamut data creating device comprising: a receiving unit that receives measurement points of a device, the measurement points being defined in a color space; an extracting unit that extracts at least four vertices from among the measurement points, the at least four vertices including first, second, and third vertices that are located adjacent to one another, the first, second, and third vertices satisfying the criteria of a distance between each two vertices among the first, second, and third vertices being smaller than a reference distance, and inner products having the same sign, each inner product being calculated between a vector defined from the first vertex to each of the respective measurement points located within the reference distance from the first vertex, and a vector normal to a plane defined by the first, second, and third vertices; and a data creating unit that creates color gamut data indicative of a color gamut, the color gamut indicating a distribution range of the measurement points based on the at least four vertices extracted by the extracting unit.