Spatial frequency filter in which frequency components greater t

Details Spatial frequency filter in which frequency components greater t Spatial frequency filter in which frequency components greater t

1987-08-31

1989-01-31

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

354407, G01J 120

Patent

active

048017957

ABSTRACT:
Apparatus and method for suppressing high frequency components in a scene being viewed and particularly components in access of the Nyquist frequency for use in autofocus camera work so as to maximize the use of the low frequency components.

REFERENCES:
patent: 4171155 (1979-10-01), Jyojiki et al.
patent: 4185191 (1980-01-01), Stauffer
patent: 4460260 (1984-01-01), Utagawa
patent: 4676623 (1987-06-01), Akashi et al.

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