公开(公告)号：US09380939B2

公开(公告)日：2016-07-05

申请号：US13930748

申请日：2013-06-28

Applicant: NIDEK CO., LTD.

Inventor： Cesare Tanassi ,  Raffaella Bisson ,  Mauro Campigotto ,  Simone Pajaro ,  Ettore Cerulli

IPC: A61B3/00 ,  A61B3/15 ,  A61B3/12

CPC classification number: A61B3/152 ,  A61B3/12 ,  F04C2270/0421

Abstract: 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.

Abstract translation: 眼底摄影装置包括：拍摄单元，包括用于照亮患者眼睛的眼底的眼底照明光学系统和具有光接收元件的眼底拍摄光学系统，以获得照明眼睛的眼底图像; 以及对准单元，用于基于预定的对准参考位置来将拍摄单元与眼睛定位。 对准单元包括：提取部，通过图像处理从由眼底拍摄光学系统获得的眼底图像中提取由来自眼底以外的部分的反射光形成的图像区域; 重心计算部，其通过算术处理来确定所提取的图像区域的重心位置; 以及控制部，其基于计算出的重心位置和对准基准位置，对眼睛进行拍摄单元的对准控制。