Pupil feature extraction apparatus, pupil feature extraction method, and program
AssigneeNippon Telegraph and Telephone Corporation
InventorsShimpei YAMAGISHI, Makoto YONEYA, Shigeto FURUKAWA
Life of this patent
Estimating the term…
Abstract
Provided is a technology to extract a feature value related to the pupil size that is not susceptible to the positional relationship between a camera and an eyeball. The technology includes: a pupil information acquisition unit that acquires pupil information expressing a pupil size of a subject from an image of an eyeball of the subject; an iris information acquisition unit that acquires iris information expressing an iris size of the subject from the image of the eyeball of the subject; and a pupil feature value calculation unit that calculates a ratio of the pupil information to the iris information as a pupil feature value.
Claims5
A pupil feature value extraction apparatus comprising:
- a pupil information acquisition unit that acquires pupil information expressing a pupil size of a subject from an image of an eyeball of the subject;
- an iris information acquisition unit that acquires iris information expressing an iris size of the subject from the image;
- and a pupil feature value calculation unit that calculates a ratio of the pupil information to the iris information as a pupil feature value.
A pupil feature value extraction method comprising:
- a pupil information acquisition step of acquiring, by a pupil feature value extraction apparatus, pupil information expressing a pupil size of a subject from an image of an eyeball of the subject;
- an iris information acquisition step of acquiring, by the pupil feature value extraction apparatus, iris information expressing an iris size of the subject from the image;
- and a pupil feature value calculation step of calculating, by the pupil feature value extraction apparatus, a ratio of the pupil information to the iris information as a pupil feature value.
Dependencies are inferred from the claim text.