Munsell Color System

In 1905, the artist AH Mun sell invented a model similar to a sphere in a psychological three-dimensional space to express the three color parameters of various surface colors: hue, lightness, and saturation. In the three-dimensional model Each part in it represents a specific color. At present the Munsell color system has been widely used in the world as a method of classifying and calibrating surface colors. The symbol of the representation method is HV/C, H stands for hue, V stands for value, and C stands for chroma .

For achromatic black-and-white series, the neutral color is represented by N, and the lightness value V is given behind, and the chroma is not written behind the slash, which is represented by NV/.

The relationship between the three parameters of color can be described by Fig. 8-6 jujube-shaped color stereo, but it is just an oversimplified model. Each point on the circumference of the largest section of the jujube pit is a change , and its color saturation is the largest. The radial direction of the largest cross-section is the change of saturation. The closer to the center of the circle, the smaller the saturation . The vertical axis passing through the center of the circle and the horizontal section is the change of brightness. The higher the direction, the greater the brightness and the whiter the color.

Figure 8-7 is a schematic representation of Munsell's three-dimensional color, which is basically from a psychological point of view, the color classification and calibration system is formulated according to the visual characteristics of the color. The specific classification method It is: Divide lightness into 10 grades, and chroma is also divided into equal grades according to vision. The chroma of each color is different, and the chroma of individual hues can reach 20. Through Figure 8-7 Munsell color three-dimensional horizontal profile can be seen that the tone is divided into 5 main colors, respectively represented by red CR), yellow CY), green CG, blue CB), purple CP), and 5 There are three intermediate tones, represented by yellow-red ( CYR), green-yellow (CGY), blue-green (BG), and purple-blue (CPB), respectively. For finer division, each tone is divided into 10 levels. Each color is in the Munsell system All can be represented by three coordinate values: hue, lightness and chroma. Munsell's color solid is closer to the actual situation than the satisfactory color solid. Although it is not perfect, the understanding of the color properties has been further deepened. The Munsell color solid horizontal section is shown in Figure 8-8.