Patent ID: 9545201
Date: 2017-01-17
CPC Classifications: A61B,G06T

Claim:
1. A fundus observation apparatus, comprising: a photographing part that photographs the fundus of a subject eye, a forming part comprising an optical system that irradiates signal light onto the fundus and interferes reflected light of the signal light from the fundus with reference light via a reference path and detects the resulting interference light, wherein the forming part forms a tomographic image of the fundus based on the detection result, and an analyzing part that analyzes a photographed image of the fundus from the photographing part to delete predetermined low-frequency components from the photographed image, and wherein, the analyzing part comprises: a smoothing part that carries out a smoothing process on the photographed image to form a smoothed image, a difference processing part that forms a difference image between the photographed image and the smoothed image by at least multiplying the photographed image and/or the smoothed image by a predetermined weight before forming the difference image, the difference image including at least a contour image of the optic disc in the fundus, a composition processing part that composes the photographed image from the photographing part and the difference image, thereby forming the photographed image with the low-frequency components removed, and the weight is set according to the degree of gradations in the photographed image of the fundus.