Color visual comparison measuring method based on digital color comparing card

Abstract

The invention relates to a color visual colorimetric measuring method based on digital coloring colorimetric cards. The digital coloring colorimetric cards are established based on a color display device in a sRGB coloring space by adopting the digital coloring technology. Each color sample in the colorimetric cards is composed of a color lump displayed by a display device; the color gamut of the colorimetric cards is flexibly set according to the needs; in the set color gamut; each color lump is generated according to the certain interval of coloring numerical value; all the generated color lumps are combined in sequence according to a certain discipline, so as to form a digital coloring colorimetric card system which has a plurality of groups, multiple levels and color classification from rough to fine, can echo mutually by linking and is convenient to search and use. The different gamuts can be formed by delimiting, namely, different color sample group can be generated, so as to be suitable for the color measurement in different hue range; as the interval of the coloring numerical value is adjusted, the number of the color sample group also changes, so as to be suitable for the requirements of different finenesses when in color measurement.

Description

technical field [0001] The invention relates to a method for measuring object color, in particular to a color visual colorimetric measurement method based on a digital color color card. Background technique [0002] When the color is measured by the known visual colorimetric method, the measured color is compared with the standard reference object - the physical standard color card (or color chip, color mark, color plate) produced by printing, coating and other processes. Comparison, using the naked eye to judge the matching degree of the tested color and the standard color to compare them. [0003] In production and life, visual colorimetry, as a traditional but convenient and practical method, is still widely used in color measurement occasions that do not require a high degree of accuracy. [0004] However, the traditional visual colorimetric method has the following problems: First, the color value interval of the physical standard color card is too large and cannot be ...

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Problems solved by technology

[0004] However, the traditional visual colorimetry has the following problems: First, the color value interval of the physical standard color card is too large and cannot be conveniently and flexibly adjusted according to needs, and the types of standard color samples that can be presented in the color card only account for The naked eye can distinguish a small part of the color, which affects the more detailed classification and division of the color; second, the production of physical standard color cards is often difficult and expensive; third, it is often not convenient to know the color value of the measured color, Especially the numerical values ​​in various color modes, so it is inconvenient to quantitatively describe the color; Fourth, it is not easy to carry out long-distance transmission of standard color samples and long-distance transmission of color information