Automatic focusing apparatus including optical flow device calculation

An automatic focusing apparatus includes an image pickup optical system; an image pickup device for converting an optical image formed by the image pickup optical system into an electric image signal at a predetermined cycle and outputting the electric signal; a focusing device; an optical flow calc...

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Bibliographische Detailangaben
1. Verfasser:	WAKASHIRO SHIGERU
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING DIAGNOSIS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY FIRE-FIGHTING HOLOGRAPHY HUMAN NECESSITIES HYGIENE IDENTIFICATION LIFE-SAVING MEDICAL OR VETERINARY SCIENCE OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION SURGERY
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Beschreibung
Zusammenfassung:	An automatic focusing apparatus includes an image pickup optical system; an image pickup device for converting an optical image formed by the image pickup optical system into an electric image signal at a predetermined cycle and outputting the electric signal; a focusing device; an optical flow calculation device for calculating optical flows in accordance with the image signals in a first image plane at a first time and a second image plane at a second time different from the first time, and for calculating an average of magnitudes and directions of the optical flows; and a judgment device for determining whether or not the focusing device is to be driven in accordance with calculated average of the magnitudes and the directions of the optical flows.