Method for detecting focus of image

Details Method for detecting focus of image Method for detecting focus of image

1981-06-19

1984-05-08

Evans, F. L.

Optics: measuring and testing

By shade or color

Photography

G01J 346

Patent

active

044471548

ABSTRACT:
The focus of a picture image on a color film is evaluated by dividing the picture image into minute picture elements, detecting those portions of the picture image which are of flesh color from the separated color transmission factor or the color density of the picture elements, and using the information obtained regarding the flesh color portions to detect whether or not the picture image is out of focus.

REFERENCES:
patent: 4203671 (1980-05-01), Takahashi et al.

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