A pixel is a single point in a graphic image. The more pixels used to represent an image the closer the result can resemble the original. Intellux The number of pixels in an image is sometimes called the resolution, though resolution has a more specific definition. Pixel counts can be expressed as a single number, as in a megapixel" digital camera, which has a nominal three million pixels.A megapixel is 1 million pixels, and is used not only for the number of pixels in an image but also often to express the number of sensor elements of digital cameras. http://www.supplements4help.com/intellux/
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