Viewfinder for TV camera use with means for enhancing the contra

Details Viewfinder for TV camera use with means for enhancing the contra Viewfinder for TV camera use with means for enhancing the contra

1985-08-01

1987-07-14

Rubinson, Gene Z.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358227, 358 37, G03B 1302

Patent

active

046806393

ABSTRACT:
The picture signal to be displayed on the viewfinder is corrected so as to be adaptive to the spatial frequency performance of visual system at close viewing distance of about three times of the viewing screen height. As a result, the luminance or the coloring of edge portions of the viewed picture is clearly emphasized and hence accurate and rapid focusing of pickup lens provided in any kind of TV camera is facilitated without conventional trial and error.

REFERENCES:
patent: 3715473 (1973-02-01), Tan
patent: 3732360 (1973-05-01), Breimer et al.
patent: 3920889 (1975-11-01), Connor
patent: 3938181 (1976-02-01), Avins
patent: 4041531 (1977-08-01), Bingham
patent: 4148059 (1979-04-01), Dillon et al.
patent: 4481540 (1984-11-01), Bergen
European Search Report of EP No. 85 11 0005.

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