(also pixellate or pixilate)
verb [with object]
divide (an image) into pixels, typically for display or storage in a digital format.
) (of an image on a computer screen or other display) be enlarged so far that the viewer sees the individual pixels that form the image, the enlargement having reached the point at which no further detail can be resolved.
display an image of (someone or something) on television as a small number of large pixels, typically in order to disguise someone’s identity.