Light image space frequency component extracting device
AssigneeNippon Kogaku K.K.
InventorsHiroshi Shirasu, Akira Ogasawara, Ken Utagawa
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Abstract
This invention discloses a device for extracting the space frequency component of an image formed by an optical system. The device comprises means having a photoelectric element array including a plurality of photoelectric elements on which said image is projected and time-sequentially generating, at a predetermined period, a pulse output having a magnitude corresponding to the intensity of light received by each of the photoelectric elements, means for successively storing the respective pulse outputs, means for converting each of the stored pulse outputs into an AC signal, and means for adding together the AC signals and producing the same.
Claims4
A device for extracting the space frequency component of an image formed by an optical system, comprising:
- (a) means having a photoelectric element array including a plurality of photoelectric elements on which said image is projected and time-sequentially generating, at a predetermined period, a pulse output having a magnitude corresponding to the intensity of light received by each of said photoelectric elements;
- (b) means for successively storing the respective pulse outputs;
- (c) means for converting each of the stored pulse outputs into an AC signal;
- and
- (d) means for adding together said AC signals and generating the same.
Dependencies are inferred from the claim text.