What does computer rgb mean?

Computer rgb refers to the RGB color mode, which is a color standard in the industry. It is based on changes in the three color channels of red (R), green (G), and blue (B) and their mutual interactions. A variety of colors are obtained by superimposing time and space; RGB represents the colors of the three channels of red, green, and blue. This standard includes almost all colors that human vision can perceive, and is one of the most widely used color systems. one.

#The operating environment of this tutorial: Windows 10 system, Dell G3 computer.

What does computer rgb mean?

RGB color mode is a color standard in the industry. It is based on changes in the three color channels of red (R), green (G), and blue (B) and their mutual interactions. Superimposed to obtain a variety of colors, RGB represents the colors of the three channels of red, green, and blue. This standard includes almost all colors that human vision can perceive, and is one of the most widely used color systems.

Application

Most monitors use the RGB color standard. On the monitor, it is produced by hitting the red, green, and blue light-emitting electrodes of the screen with an electron gun. Regarding color, computers can generally display 32-bit colors, with more than 10 million colors.

All the colors on the computer screen are made from the three colors of red, green and blue mixed in different proportions. A group of red, green and blue is the smallest display unit. Any color on the screen can be recorded and expressed by a set of RGB values.

Therefore, red, green, and blue are also called the three primary colors of light. In English, they are R (red), G (green), and B (blue).

In computers, the so-called "how much" of RGB refers to brightness, and is represented by integers. Normally, RGB each has 256 levels of brightness, expressed numerically from 0, 1, 2... until 255. Note that although the highest number is 255, 0 is also one of the values, so there are 256 levels in total. Just like 2000 to 2010 is a total of 11 years.

According to calculations, a total of 256 levels of RGB colors can be combined to produce about 16.78 million colors, that is, 256×256×256=16777216. It is also often referred to as 16 million colors or tens of millions of colors. Also called 24-bit color (2 to the 24th power).

In the LED field, three-in-one dot matrix full-color technology is used, that is, RGB three-color chips form full-color pixels in a light-emitting unit. As this technology continues to mature, LED display technology will bring people a richer and more realistic color experience.

Principle

RGB is designed based on the principle of color luminescence. In layman's terms, its color mixing method is like There are three lights, red, green and blue. When their light is superimposed on each other, the colors are mixed, but the brightness is equal to the sum of the three brightnesses. The more mixed, the higher the brightness, that is, additive mixing.

The superposition of red, green, and blue lights. The brightest superposition area of ​​the three central colors is white. The characteristics of additive mixing: the more superimposed, the brighter it becomes.

Each color of the three color channels of red, green, and blue is divided into 256 levels of brightness. At 0, the "light" is the weakest - it is turned off, and at 255, the "light" is the brightest. When the grayscale values ​​of the three colors are the same, gray tones with different grayscale values ​​are produced. That is, when the grayscales of the three colors are all 0, it is the darkest black tone; when the grayscales of the three colors are all 255, it is the brightest white tone. .

RGB colors are called additive colors because you create white by adding R, G, and B together (that is, all the light reflects back to the eye). Additive colors are used in lighting, televisions, and computer monitors. For example, displays produce color by emitting light from red, green, and blue phosphors. The vast majority of the visible spectrum can be represented as a mixture of red, green, and blue (RGB) colors of light in varying proportions and intensities. If these colors overlap, yellow, cyan, and purple are produced.

RGB format

The method of encoding a color is collectively called a "color space" or "color gamut". In the simplest terms, the "color space" of any color in the world can be defined as a fixed number or variable. RGB (red, green, blue) is just one of many color spaces. With this encoding method, each color can be represented by three variables - red, green, and the intensity of blue. When recording and displaying color images, RGB is the most common solution. However, it lacked good compatibility with early black and white display systems. Therefore, a common practice adopted by many electronic and electrical manufacturers is to convert RGB into YUV color space to maintain compatibility, and then switch back to RGB format as needed to display color graphics on computer monitors.

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