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A pixel (short for "picture element") is the smallest unit of a digital image that can be displayed on a screen or printed on paper. It is a single point in a larger grid of points that make up the image.
Pixels are typically represented as tiny squares or dots of color, and the number of pixels in an image determines its resolution. Higher-resolution images have more pixels, resulting in a clearer and more detailed image.
Pixels are used in many types of digital media, including photographs, videos, computer graphics, and displays such as computer monitors, televisions, and mobile devices. They are also used in printing, where the resolution of an image is measured in dots per inch (DPI) or pixels per inch (PPI).