Single image (film)

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Single frames of a film

As a single image (engl. Frame) refers to a single image from a film sequence. It represents the elementary unit of the medium of film , analogous to the letters in writing . The single image in static photography is called a still image .

On the film strip of a television or cinema film, individual images form a chronological sequence that can only be meaningfully understood in this chronology; reversing or interchanging this sequence represents an alienation effect . An example of this is backward projection; in this so-called time - reversal trick , the film is shown backwards. Single frames in films by amateur photographers can, but do not have to have cohesion - in contrast to serial photography or cinema films .

Another time axis manipulation is time lapse , in which the time intervals between the individual cinematic frames are shortened (usually 18 to 24 frames per second); When projecting the sequence of individual images, the sun sets in a few moments or the blossom of a flower opens within a few seconds. The opposite effect of slowing down a movement by recording at more than 24 frames per second is called slow motion .

A special case in cinema is the enlargement of a single image from the film strip; every single film image can be enlarged or exposed using photo technology. However, the promotional still images that are made for cinema films are always created by still photographers and do not always coincide with the image that is contained on the film strip of the cinema film. In the publications of the scientific cinematheques , however, one often finds exposures of individual images of a movie.

Another special case of the individual image extracted from a film sequence are digitally compressed film files; Compression methods such as MPEG do not completely save all individual images, only the differences within a defined sequence; here it is only possible to a limited extent to access a specific individual image.