How is a single color represented in a digital image?

In a digital image, a single color is represented using a combination of values for each pixel in the image. The most common way to represent colors in digital images is through the use of the RGB color model. In the RGB model, each color is described as a combination of three primary colors: Red, Green, and Blue.

Here's how a single color is represented in a digital image using the RGB color model:

1. Red, Green, Blue Components:

• Each pixel in the image is composed of three color channels: Red, Green, and Blue.
• The intensity of each of these colors is represented by a numerical value ranging from 0 to 255. A value of 0 represents no intensity (no color), while a value of 255 represents maximum intensity.

2. Color Values:

• The combination of the Red, Green, and Blue values for a pixel determines the color of that pixel.
• For example, a pixel with RGB values of (255, 0, 0) represents a pure red color because the red channel is at its maximum intensity (255), while the green and blue channels have no intensity (0).

3. Color Gamut:

• The combination of different intensities for the three color channels allows for a wide range of colors to be represented. This is often referred to as the color gamut.

4. Bit Depth:

• The precision of color representation is influenced by the bit depth. Common bit depths for each color channel are 8 bits per channel, providing 256 possible intensity levels (2^8 = 256). Higher bit depths, such as 16 bits per channel, allow for more precision and a larger range of possible colors.

5. Hexadecimal Notation:

• Colors are often represented in hexadecimal notation for convenience. For example, pure red can be represented as #FF0000, where FF corresponds to the maximum intensity for the red channel.