The RGB color model is an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colors. The name of the model comes from the initials of the three additive primary colors, red, green, and blue.
The main purpose of the RGB color model is for the sensing, representation, and display of images in electronic systems, such as televisions and computers, though it has also been used in conventional photography. Before the electronic age, the RGB color model already had a solid theory behind it, based in human perception of colors.
RGB is a device-dependent color model: different devices detect or reproduce a given RGB value differently, since the color elements (such as phosphors or dyes) and their response to the individual R, G, and B levels vary from manufacturer to manufacturer, or even in the same device over time. Thus an RGB value does not define the same color across devices without some kind of color management.
Typical RGB input devices are color TV and video cameras, image scanners, and digital cameras. Typical RGB output devices are TV sets of various technologies (CRT, LCD, plasma, etc.), computer and mobile phone displays, video projectors, multicolor LED displays, and large screens such as JumboTron, etc. Color printers, on the other hand, are not RGB devices, but subtractive color devices (typically CMYK color model).
This article discusses concepts common to all the different color spaces that use the RGB color model, which are used in one implementation or another in color image-producing technology.
Read more about RGB Color Model: Additive Primary Colors, Physical Principles For The Choice of Red, Green, and Blue, History of RGB Color Model Theory and Usage, Numeric Representations, Geometric Representation, Colors in Web-page Design, Color Management, RGB Model and Luminance–chrominance Formats Relationship
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... YDBDR for SECAM, and YPBPR for component video use color difference signals, by which RGB color images can be encoded for broadcasting/recording and later decoded into RGB ... Also, those color difference signals need lower data bandwidth compared to full RGB signals ... Similarly, current high-efficiency digital color image data compression schemes such as JPEG and MPEG store RGB color internally in YCBCR format, a digital luminance-chrominance format based on YPBPR ...
... The RGB color model is an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colors ... The name of the model comes from the initials of the three additive primary colors, red, green, and blue ... The main purpose of the RGB color model is for the sensing, representation, and display of images in electronic systems, such as televisions and computers ...
... See also Indexed color The terms color palette, indexed color, and related terms have been used with various differences in meaning, as discussed below ... The RGB color model is today the most usual method to produce and encode colors but colors in palettes may or may not be reproduced through red-green-blue ... To express that a given palette usage is based in the RGB color model, the term RGB palette is commonly employed, within many of the contexts in which the term palette can be used (see the ...
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