Images are typically made up of one or more channels, where each channel assigns a specific value to every pixel within the image. In the case of a grayscale image, it usually consists of a single channel that represents the brightness level of each pixel. For color images, they commonly have three channels. In the RGB (Red, Green, Blue) color model, each channel corresponds to the intensity of red, green, and blue respectively; while in the HSL (Hue, Saturation, Lightness) model, they represent hue, saturation, and lightness. Additionally, a fourth channel is often incorporated to denote depth information or transparency, which is particularly useful in advanced image processing and computer graphics applications.
