Pixels are, therefore, the most basic element of a digital image, a small square of color. But pixels have no size; in fact, pixels only exist within the computer. A closer look at a pixel reveals that it is no more than a simple set of numbers used to describe a color. For most images, each pixel contains a Red (R), Green (G), and Blue (B) value. The computer uses these RGB values to create the color for that particular pixel. Grayscale images don't use RGB values. They use only one

9-tt number for each pixel to represent "black" density. It is important to remember computers only think in terms of number values, and your image is broken down into an array of simple numbers for each pixel.

Pixels are simple, square elements that make up a digital image. Pixels have no size and exist only with the computer. Pixels contain simple numbers that describe its color.

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