Image processing apparatus and method, and video camera

Details Image processing apparatus and method, and video camera Image processing apparatus and method, and video camera

1993-07-19

1995-03-07

Groody, James J.

Television

Camera, system and detail

Combined image signal generator and general image signal...

348300, 348255, H04N 5235

Patent

active

053962885

ABSTRACT:
A suitable image signal is obtained even with regard to a subject exhibiting a very large difference in luminance between bright and dark areas. A video signal obtained from a CCD by imaging the subject is amplified by a first amplifier, converted into digital image data A by a first A/D converter and then stored in a first memory. The video signal from the CCD is also amplified by first and second amplifiers, converted into image data B by a second A/D converter and then stored in a second memory. The amplification factor of the first second amplifier is set such that a comparatively dark area of the image of the subject will assume a level having an appropriate brightness. A multiplexer selects data representing a comparatively bright area of the image of the subject from image data read out of the first memory as well as data representing a comparatively dark area of the image of the subject from image data read out of the second memory. The selected items of data are combined (by inlay synthesis) to obtain image data representing an image exhibiting overall brightness.

REFERENCES:
patent: 4635126 (1987-01-01), Kinoshita
patent: 4797745 (1989-01-01), Westell
patent: 4962426 (1990-10-01), Naoi et al.
patent: 5014120 (1991-05-01), Numakura et al.
patent: 5247360 (1993-09-01), Kawada et al.

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