Watermarking a film

A watermark is written on a film (140) by compensating an emulsion of the film for pre-exposure to a single colour light. The film is then transported past and exposed by a spatially modulated colour light source (60), preferably a blue LED. The watermark may be digital and may cover all of the film...

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Bibliographische Detailangaben
Hauptverfasser:	ROBERT J. ZOLLA, LESLIE GUTIERREZ, JAMES EDWARD RODDY
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM AUXILIARY PROCESSES IN PHOTOGRAPHY CALCULATING CINEMATOGRAPHY COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY HOLOGRAPHY IMAGE DATA PROCESSING OR GENERATION, IN GENERAL PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES PHOTOGRAPHY PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:	A watermark is written on a film (140) by compensating an emulsion of the film for pre-exposure to a single colour light. The film is then transported past and exposed by a spatially modulated colour light source (60), preferably a blue LED. The watermark may be digital and may cover all of the film.