Camera apparatus

Details Camera apparatus Camera apparatus

1990-10-23

1994-03-08

Chilcot, Jr., Richard E.

Television

Camera, system and detail

Combined image signal generator and general image signal...

H04N 314, H04N 5335

Patent

active

052932397

ABSTRACT:
A camera apparatus has an image sensing part arranged to successively output for every field or frame a first image signal obtained for a predetermined exposure period of time and a second image signal obtained for a very short exposure period of time, a noise extracting circuit arranged to extract a fixed pattern noise from the second image signal, and a subtraction circuit arranged to subtract, under a predetermined weighting condition, the fixed pattern noise extracted by the noise extracting circuit first image signal. Another camera apparatus has an image sensing part capable of adjusting an exposure period of time, a control circuit arranged to change the exposure period of time of the image sensing part to a high shutter-speed photography at intervals of a predetermined number of taken pictures, an interpolation circuit arranged to interpolate an image signal obtained by the high shutter-speed photography by using an image signal obtained for a predetermined exposure period of time, a noise extracting circuit arranged to extract a fixed pattern noise from the image signal obtained by the high shutter-speed photography, and a subtraction circuit arranged to subtract, under a predetermined weighting condition, the fixed pattern noise extracted by the noise extracting circuit from the image signal obtained for the predetermined exposure period of time by the image sensing part or from an interpolated image signal obtained by the interpolation circuit.

REFERENCES:
patent: 3629499 (1971-12-01), Carlson
patent: 3728481 (1973-04-01), Froehlich
patent: 3949162 (1976-04-01), Malveg
patent: 4079423 (1978-03-01), Diehl
patent: 4496982 (1985-01-01), Levine
patent: 4498105 (1985-02-01), Crawshaw
patent: 4525743 (1985-06-01), Wood, Jr.
patent: 4562473 (1985-12-01), Levine
patent: 4739409 (1988-04-01), Baumeister
patent: 4807034 (1989-02-01), Takeuchi et al.
patent: 4839729 (1989-06-01), Ando
patent: 4841366 (1989-06-01), Katagiri et al.

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