In computer graphics, pixellation is an effect caused by displaying an image at such a large size that individual pixels are visible to the eye.
What is a pixel?
A pixel is a small single-coloured square display element. A Photo you take on your digital camera is made up of many pixels. You may have heard of Megapixels, your phone may have a 2Mp(Megapixel) camera built-in.
For a camera with an array of 4500 x 3111 is commonly said to have “14 megapixels”
What does pixellation look like?
The image on the left in normal and the image on the right shows severe pixellation.