Title:
OPHTHALMOLOGIC APPARATUS AND METHOD FOR MEASURING MOVEMENT OF SUBJECT EYE
Document Type and Number:
Japanese Patent JP2015033650
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To solve the following problem: the conventional eyeball movement measurement apparatus (eyeball tracking apparatus) extracts a feature point from fundus images and calculates the amount of eyeball movement between acquired images by comparing images; however, if the extracted feature point is in an edge part of the acquired image, the amount of eyeball movement cannot be detected because the feature point is not in the next image when the eyeball moves.SOLUTION: An ophthalmologic apparatus detects the movement of a subject eye by detecting the positional change of a feature point between plural fundus images acquired from the subject eye. The ophthalmologic apparatus comprises: acquisition means for acquiring fundus images of the subject eye; setting means for setting a first region with a given width in a first fundus image of the acquired fundus images; and extraction means for extracting a feature point from a second region which is a remaining region after the first region is excluded from the first fundus image.
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Inventors:
MAKIHIRA TOMOYUKI
Application Number:
JP2014234236A
Publication Date:
February 19, 2015
Filing Date:
November 19, 2014
Export Citation:
Assignee:
CANON KK
International Classes:
A61B3/113; A61B3/14
Domestic Patent References:
| JP2010012109A | 2010-01-21 | |||
| JP2006095009A | 2006-04-13 |
Attorney, Agent or Firm:
Okabe 讓
Shin-ichi Usui
Takao Ochi
Seiichiro Takahashi
Hiroshi Yoshizawa
Masami Saito
Katsuhiko Kimura
Takafumi Tanaka
Shin-ichi Usui
Takao Ochi
Seiichiro Takahashi
Hiroshi Yoshizawa
Masami Saito
Katsuhiko Kimura
Takafumi Tanaka