Fundus photographing apparatus

摘要

A fundus photographing apparatus includes: a photographing unit including a fundus illumination optical system to illuminate a fundus of a patient's eye and a fundus photographing optical system having a light receiving element to obtain a fundus image of the illuminated eye; and an alignment unit to position the photographing unit with the eye based on a predetermined alignment reference position. The alignment unit includes: an extracting part to extract, by image processing, an image region formed by reflection light from a portion other than the fundus from the fundus image obtained by the fundus photographing optical system; a gravity center calculating part to determine, by arithmetic processing, a gravity center position of the extracted image region; and a control part to perform alignment control of the photographing unit with the eye based on the calculated gravity center position and the alignment reference position.

主权项

1. A fundus photographing apparatus comprising:
a photographing unit including a fundus illumination optical system configured to illuminate a fundus of a patient's eye and a fundus photographing optical system having a light receiving element configured to obtain an image of the fundus of the patient's eye illuminated by the illumination optical system; and an alignment unit configured to position the photographing unit with the patient's eye based on a predetermined alignment reference position, the alignment unit including:
an extracting part configured to extract, by image processing, an image region formed by reflection light from a portion other than the fundus from the fundus image obtained by the fundus photographing optical system;a gravity center calculating part configured to determine, by arithmetic processing, a gravity center position of the image region extracted by the extracting part; anda control part configured to perform alignment control of the photographing unit with respect to the patient's eye based on the gravity center position calculated by the gravity center calculating part and the alignment reference position.