artifacting
[ ahr-tuh-fak-ting ]
/ ˈɑr təˌfæk tɪŋ /
noun
Digital Technology.
the introduction of a visible or audible anomaly during the processing or transmission of digital data: Proper encoding will eliminate artifacting and pixilation in the images.
the introduction of any feature that is not naturally present but is a product of an extrinsic agent, method, or the like: Grainy artifacting in the final print is the result of dirt on the negative that could not be removed.