Question

What is RGB model? Find a RGB coordinate of a color at (0.2,1,0.5) in CMY space

Answer 1

The RGB model is a color representation method based on the additive mixing of the three primary colors red (R), green (G), and blue (B). It represents approximately 16.77 million colors through combinations of intensity values from 0 to 255 and is widely used in screen displays. According to the complementary relationship between RGB and CMY (R=1-C, G=1-M, B=1-B), when the CMY coordinates are (0.2, 1, 0.5), their RGB coordinates are (1-0.2, 1-1, 1-0.5), or (0.8, 0, 0.5). To represent a 255-level integer, multiply the decimal by 255 and round down to (204, 0, 128).

Answer 2

The RGB model is an additive color model that generates various colors by combining the intensities of the three primary colors red (R), green (G), and blue (B) (usually with a value range of 0-255). It is widely used in electronic display devices (such as screens, televisions, and cameras). The principle is to superimpose light to enhance brightness. When all three are bright, white appears, and when all three are dark, black appears.

Answer 3

The CMY color space is a three-dimensional color coordinate system composed of cyan (C), magenta (M), and yellow (Y). It belongs to the subtractive color mixing model. By adjusting the ratio of these three primary colors (usually ranging from 0 to 100), a variety of colors can be mixed. It is mainly used in printing and color printing, which rely on the reflection of light from pigments or inks to produce color. The principle is to reduce the amount of reflected light by absorbing specific wavelengths of light. For example, cyan absorbs red light, magenta absorbs green light, and yellow absorbs blue light. The superposition of these three colors creates a transition from white to black.

Answer 4

The RGB model is an additive color model that represents and displays colors based on combinations of the three primary colors: red, green, and blue.

In the RGB model, each color has a value between 0 and 255 (or 0.0 and 1.0 in normalized form). By adjusting the intensities of these three colors, nearly all visible colors can be mixed.

The RGB model is widely used in electronic display devices such as televisions, computer monitors, and digital cameras.

The CMY model is a subtractive color model that prints or displays colors based on combinations of the three primary colors: cyan, magenta, and yellow. In the CMY model, colors are obtained by subtracting these primary colors from white.

RGB and CMY color spaces can be converted to each other using certain conversion formulas. The conversion formula is as follows:

R=1−C,

G=1−M,

B=1−Y.

Given the CMY coordinates (0.2, 1, 0.5), the corresponding RGB coordinates can be found using the above formula.

Calculating R:

R=1−C=1−0.2=0.8,

Calculating G:

G=1−M=1−1=0,

Calculating B:

B=1−Y=1−0.5=0.5,

Therefore, in RGB space, the CMY coordinates (0.2, 1, 0.5) correspond to the color coordinates (0.8, 0, 0.5).