The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 26, 2000
Filed:
May. 14, 1997
Eric Auffret, Noyal sur Vilaine, FR;
Laurent Bizos, Gif sur Yvette, FR;
Laurent Blonde, Thorigne-Fouillard, FR;
Thomson Licensing S.A., Boulogne Cedex, FR;
Abstract
The present invention relates to a camera (1) for generating a cut key signal (K) for a subject moving in front of a background on the basis of invisible frequencies originating from the said background. The camera comprises an optical separator (3), a detector (7) and a processing circuit (9). The optical separator (3) makes it possible to separate the beam, representing the subject and the background, into four separate beams, including three colour beams (FR, FV, FB) and a fourth beam consisting of the invisible frequencies originating from the background. The detector (7) makes it possible to convert the energy contained in the fourth beam to an electrical signal (PIR), and the processing circuit (9) makes it possible to generate the key signal (k) from the electrical signal originating from the detection of the invisible frequency beam. The invention applies to the cutting of subjects moving in front of coloured backgrounds so as to place these subjects in front of new coloured backgrounds.