METHOD FOR PHOTOGRAPHING FOR TELEVISION AND VIDEO COMPOSITE DEVICE

PROBLEM TO BE SOLVED: To securely detect a zoom ratio and a position relation in simple constitution and to provide a suitable picture by arranging a second camera whose optical axis matches an image pickup camera and which has a specified focal distance and obtaining the zoom ratio and the position...

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Bibliographische Detailangaben
Hauptverfasser: MATSUNAGA TSUTOMU, KURAMOTO IKUO, ISHIBASHI SHIZUKA
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To securely detect a zoom ratio and a position relation in simple constitution and to provide a suitable picture by arranging a second camera whose optical axis matches an image pickup camera and which has a specified focal distance and obtaining the zoom ratio and the position relation from video signals from both cameras by an arithmetic operation. SOLUTION: The attachment camera 2 where the focal distance is in the almost middle of the zoom range of the image pickup camera 1 is arranged. The optical axis of the camera 1 is branched by a half mirror 5 and the optical axes of the camera 1 and the camera 2 are matched. A zoom operation part 3 inputs the video signals from the cameras 1 and 2, compares both sizes and obtains the zoom ratio of the camera 1 by the operation. A position relation operation part 4 obtains a position parameter from the positions of an object and the background by the video signal of the camera 2. A composite operation part 8 executes a composite operation from an object video, a zoom parameter and the position parameter, controls the sizes and the positions of the object video and the background and obtains the composite picture.