Video camera and camera system having an electronic viewfinder p

Details Video camera and camera system having an electronic viewfinder p Video camera and camera system having an electronic viewfinder p

1992-06-09

1995-03-14

Razavi, Michael T.

Television

Camera, system and detail

With electronic viewfinder or display monitor

348358, H04N 5225

Patent

active

053980620

ABSTRACT:
A video camera having a zoom function and a camera system are provided, wherein a ratio of view fields of the video camera and a photographic camera is calculated based on information about zooming powers of imaging lenses, and an image frame of the photographic cameras is displayed in a variable size at an electronic viewfinder in accordance with the ratio of the view fields and based on a picked-up image of fixed size, or a picked-up image is displayed in a variable size on the basis of the image frame of the photographic camera. View angles of the video camera and the photographic camera are obtained from the information about the zooming powers of the imaging lenses, and zoom adjustment is carried out with the view angles coinciding with each other, or the zooming power of one of the video camera and the photographic camera is adjusted such that the view angles become equal to each other. Accordingly, the view field of the photographic camera can be accurately recognized even if the zooming power is changed.

REFERENCES:
patent: 4148072 (1979-03-01), Vockenhuber
patent: 4432014 (1984-02-01), Roos et al.
patent: 4527201 (1985-07-01), Cappels
patent: 4978983 (1990-12-01), StAlfors
patent: 5161025 (1992-11-01), Nakao
Patent Abstracts of Japan, vol. 13, No. 185 (P-865), May 2, 1989 JP (A) 10-13530 (abstract).
Patent Abstracts of Japan, vol. 14, No. 303 (P-1070), Jun. 29 1990 JP (A) 20-97928 (abstract).

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