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RGB is the color space most commonly used to display computer graphics on a monitor. For each pixel in the image, a red value, a green value and a blue value is stored. These three colors correspond to the three types of color-sensitive cones in the human eye, and can therefore reproduce any color percievable by humans which happens to be between the [black level]? and [white point]? of the monitor being used to display the image. Typically these values vary between zero and 255. |
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RGB is an acronym for "red, green, blue". The RGB color space is a commonly-used model for representing colour mathematically. |
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As an example: * (0, 0, 0) is black * (255, 255, 255) is white * (255, 0, 0) is red * (0, 255, 0) is green * (0, 0, 255) is blue * (255, 255, 0) is yellow * (0, 255, 255) is cyan * (255, 0, 255) is magenta It is important to note that the intensity of the color output on computer display devices isn't always linear. That is -- even though a value of 127 is very close to halfway between zero and 255, the color output of a computer display device when displaying (127, 127, 127) is measured, you would likely find it to be significantly higher than halfway between the [black level]? and [white point]? of your monitor. This is because most display devices have a [display gamma]?. (i.e. the behavior of most display devices is, unfortunately, not linear in the relationship between color value and output intensity). |
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