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What Does Pixelization Mean When Talking About Photographs and Photography?

When talking about photography, specifically digital photography and image processing ‘pixelization’ is the deterioration of a low-resolution image caused by a lack of enough pixels to render an image smoothly. When an image becomes pixilized the human eye is able to determine individual pixels within an image, making the image look fake or overly digitized. Printing an image at a low DPI will result in the image becoming Pixelated, as will aggressively up-sampling an image. Pixelization does however have a useful function; It is often employed to censor images so that aspects of the picture are not recognizable to the human eye.