Double exposure
Analogue
In film and photography, double exposure is a technique in which a piece of film is exposed twice, to two different images. The resulting photographic image shows the second image superimposed over the first. The technique can be used to create ghostly images or to add people and objects to a scene that were not originally there. It is frequently used in photographic hoases. It also is sometimes used as an artistic visual effect, especially when filming singers or musicians.
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