For Defocus we have terms and definitions in 2 topics. The topics are Camcorder and Electronic Cinematography.

This process, or effect, occurs when the camera operator zooms in, alters the focus, and then, at the appropriate moment, restores the focus. This effect is used often in suspense films, psychological thrillers, etc.
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Optical or digital effect where the whole frame of video or some part of it appears to be significantly blurred. For instance, a single white pixel will spread gradually over several of its neighbors. Similar to, but, not the same as anti-aliasing.
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