Characteristic image extraction method and ophthalmologic apparatus

An ophthalmologic method comprising the steps of:

• acquiring a first fundus image of an eye to be inspected, at a presentation position of a fixation index;
• extracting in a first extracting step first characteristic images from the first fundus image;
• acquiring a second fundus image of the eye, after the presentation position of the fixation index is changed;
• and
• determining whether at least one of the first characteristic images is not included in the second fundus image;
• and
• extracting in a second extracting step at least one second characteristic image, differing from the first characteristic images, from a range in the second fundus image where the second fundus image is different from the first fundus image when it is determined by the determining step that at least one of the first characteristic images is not included in the second fundus image.

An ophthalmologic apparatus comprising:

• a fixation index presenting unit configured to present a fixation index;
• a fundus image acquiring unit configured to acquire a first fundus image of an eye to be inspected and to acquire, after a presentation position of the fixation index is changed by the fixation index presenting unit, a second fundus image of the eye to be inspected;
• a first extracting unit configured to extract a plurality of characteristic images from the first fundus image;
• a determining unit configured to determine a range based on the changed presentation position in the second fundus image when it is determined by the determining unit that at least one of the plurality of characteristic images is not included in the second fundus image;
• and
• a second extracting unit configured to extract at least one characteristic image from the range.

An ophthalmologic method comprising the steps of:

• acquiring a first fundus image of an eye to be inspected, at a presentation position of a fixation index;
• extracting, in a first extracting step, first characteristic images from the first fundus image;
• acquiring a second fundus image of the eye, after the presentation position of the fixation index is changed;
• determining a range based on the changed presentation position in the second fundus image when it is determined by the determining step that at least one of the first characteristic images is not included in the second fundus image;
• and
• extracting, in a second extracting step, at least one second characteristic image from the range.

An ophthalmologic apparatus comprising:

• a fixation index presenting unit configured to present a fixation index;
• a fundus image acquiring unit configured to acquire a first fundus image of an eye to be inspected and to acquire, after a presentation position of the fixation index is changed by the fixation index presenting unit, a second fundus image of the eye to be inspected;
• a first extracting unit configured to extract a plurality of characteristic images from the first fundus image, as first characteristic images;
• a determining unit configured to determine whether or not each of the plurality of characteristic images is included in the second fundus image;
• a setting unit configured to set a range based on the changed presentation position in the second fundus image according to a determination result from the determining unit;
• and
• a second extracting unit configured to extract at least one characteristic image from the range, as at least one second characteristic image.

An ophthalmologic method comprising the steps of:

• acquiring a first fundus image of an eye to be inspected, at a presentation position of a fixation index;
• extracting, in a first extracting step, first characteristic images from the first fundus image, as first characteristic images;
• acquiring a second fundus image of the eye, after the presentation position of the fixation index is changed;
• determining whether or not each of the plurality of characteristic images is included in the second fundus image;
• setting a range based on the changed presentation position in the second fundus image according to a determination result of the determining step;
• and
• extracting, in a second extracting step, at least one second characteristic image from the range, as at least one second characteristic image.

An ophthalmologic apparatus comprising:

• an extracting unit configured to extract a plurality of characteristic images from a first fundus image of an eye to be inspected;
• a fixation index presenting unit configured to present a fixation index;
• an acquiring unit configured to acquire, when a presentation position of the fixation index is changed by the fixation index presenting unit, a second fundus image of the eye to be inspected;
• and
• a determining unit configured to determine whether at least one of the plurality of characteristic images is not included in the second fundus image and to determine at least one characteristic image from the plurality of characteristic images in a range of the fundus that can be observed based on the changed presentation position within the second fundus image.

An ophthalmologic method comprising the steps of:

• extracting a plurality of characteristic images from a first fundus image of an eye to be inspected;
• presenting a fixation index;
• acquiring, when a presentation position of the fixation index is changed, a second fundus image of the eye to be inspected;
• determining whether at least one of the plurality of characteristic images is not included in the second fundus image;
• and
• determining at least one characteristic image from the plurality of characteristic images in a range of the fundus that can be observed based on the changed presentation position within the second fundus image.