artifact
error in the perception or representation of any visual or aural information
ghosting
replica of the transmitted image, offset in position
ringing artifact
type of artifact in signal-processing that appears near sharp transitions
aliasing
different continuous signals becoming indistinguishable when sampled
visual artifact
anomalies during visual representation of e.g. digital graphics and imagery
radar angels
radar artifact
digital artifact
undesired or unintended alteration in data introduced in a digital process by an involved technique and/or technology