Megapixel

What Does Megapixel Mean?

A megapixel is a unit that describes the resolution of a camera or the images that that camera produces. It is equal to one million pixels, and is represented by the most basic element that comprises an image: a simple dot. The more pixels there are, the bigger the resolution of the image and the more times you can zoom in without ruining the quality of the image through pixilation or the enlargement of the pixels. Having more megapixels also mean having a larger file size.

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Techopedia Explains Megapixel

Megapixels are considered one of the most important features of a camera, but this measure is not the only important factor that determines image quality. Megapixels only determine how large the resulting image can be based on the total number of pixels. What actually determines the quality of images captured by a camera is the type and quality of the image sensor. The sensor makes the difference between a good 10-megapixel picture and a bad one.

The megapixel count determines how large the image can be printed without a loss of quality. For example, a 1.3 megapixel cell phone camera can take images that are good for printing of up to 4×3 inches. If the image is blown up beyond that size, image quality degrades dramatically.

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Margaret Rouse

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.