Table of Contents
Question
What is the numerical range of the Red, Green, Blue (RGB) color model?
A. [0, 255]
B. (-124, 125)
C. [-124, 125]
D. (0, 255]
Answer
A. [0, 255]
Explanation
The RGB color model is a widely used color representation system in digital imaging and computer graphics. It defines colors as a combination of three primary components: Red, Green, and Blue. Each of these components is assigned a value that represents its intensity.
Range of Values
In the standard 8-bit RGB model, each color channel (Red, Green, Blue) can have a value between 0 and 255, inclusive.
Why?
The values are stored in 1 byte (8 bits) per channel, where:
- 0 represents no intensity (black).
- 255 represents maximum intensity (full brightness for that color).
Combining these three channels allows for 256 × 256 × 256 = 16,777,216 possible colors.
Alternative Representations
While the range is standard for uint8 data types, other formats like float or double may normalize the range to. However, this does not change the underlying principle of the RGB model.
Why Other Options Are Incorrect
B. (-124, 125) and C. [-124, 125]: These ranges are invalid for RGB as they include negative values, which do not exist in standard RGB representations.
D. (0, 255]: This range excludes 0 and includes only values greater than 0 up to and including 255. This is incorrect because RGB values start at 0.
In summary, the numerical range for the RGB color model in its standard form is, making option A the correct choice.
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