Image sensor and electronic still camera with an addressable ima

Details Image sensor and electronic still camera with an addressable ima Image sensor and electronic still camera with an addressable ima

1994-04-05

1995-05-09

Groody, James J.

Television

Camera, system and detail

Combined image signal generator and general image signal...

348231, 3589091, H04N 5228

Patent

active

054144647

ABSTRACT:
An electronic still camera wherein an image compression circuit can be simplified includes a lens system, a shutter, an image sensor and a processing circuit. A video signal for one frame outputted from the processing circuit in response to a shutter operation is written into a memory. A video signal read out from the memory is compressed in accordance with the JPEG system by an image compression circuit and then written into a memory card. The image sensor is constituted from an image pickup section and a product sum calculation section. A CMD image sensor capable of non-destructively reading out a picture signal is used as the image pickup section. The product sum calculation section performs DCT processing required for compression processing of the JPEG system. Since a detected image signal processed by DCT processing is obtained from the image sensor, DCT processing of the image compression circuit is unnecessary.

REFERENCES:
patent: 4475131 (1984-10-01), Nishizawa
patent: 5016107 (1991-05-01), Sasson
patent: 5083150 (1992-01-01), Nagasaki
patent: 5249053 (1993-09-01), Jain

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