back projection
Noun
Meaning
(film) A cinematic technique in which live action is filmed in front of a screen on which the background action or a background scene is projected.
Synonym: rear projection
tomographic reconstruction
Source: en.wiktionary.orgExamples
Earlier methods, such as filtered back projection, assume a perfect scanner and highly simplified physics, which leads to a number of artifacts, high noise and impaired image resolution.
Filtered back projection (FBP) has been frequently used to reconstruct images from the projections.
The technique of filtered back projection is one of the most established algorithmic techniques for this problem.