Detection method and system
First Claim
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1. A detection method executed by a computer, the detection method comprising:
- detecting one or more pupil candidates from a face image region corresponding to a face of a subject in an image that includes a subject based on specific shape information;
identifying an eye region in the image;
comparing brightness information of the eye region with brightness information of a background portion of the image that excludes the face of the subject;
identifying, when a result of the comparing indicates that a brightness of the eye region is brighter than a brightness of the background portion of the image that excludes the face of the subject, at least one pupil candidate as a pupil from among the one or more pupil candidates based on the brightness information of the background portion and based on relationship information indicating a relationship between the brightness information of the background portion and a size of the pupil; and
identifying, when the result of the comparing indicates that the brightness of the eye region is darker than the brightness of the background portion, the at least one pupil candidate from the one or more pupil candidates based on another relationship information indicating a relationship between the brightness information of the eye region and the size of the pupil.
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Abstract
A detection method executed by a computer, the detection method includes detecting a plurality of pupil candidates from a face image region in an image of a subject based on specific shape information, and identifying at least one pupil candidate as a pupil from among the plurality of pupil candidates based on brightness information related to an image region outside of the face image region and learning information indicating a relationship between the brightness information and a size of the pupil.
27 Citations
16 Claims
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1. A detection method executed by a computer, the detection method comprising:
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detecting one or more pupil candidates from a face image region corresponding to a face of a subject in an image that includes a subject based on specific shape information; identifying an eye region in the image; comparing brightness information of the eye region with brightness information of a background portion of the image that excludes the face of the subject; identifying, when a result of the comparing indicates that a brightness of the eye region is brighter than a brightness of the background portion of the image that excludes the face of the subject, at least one pupil candidate as a pupil from among the one or more pupil candidates based on the brightness information of the background portion and based on relationship information indicating a relationship between the brightness information of the background portion and a size of the pupil; and identifying, when the result of the comparing indicates that the brightness of the eye region is darker than the brightness of the background portion, the at least one pupil candidate from the one or more pupil candidates based on another relationship information indicating a relationship between the brightness information of the eye region and the size of the pupil. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A detection device, comprising:
circuitry configured to; detect one or more pupil candidates from a face image region corresponding to a face of a subject in an image that includes a subject based on specific shape information; identify an eye region in the image; compare brightness information of the eye region with brightness information of a background portion of the image that excludes the face of the subject; identify, when a result of the comparing indicates that a brightness of the eye region is brighter than a brightness of the background portion of the image that excludes the face of the subject, at least one pupil candidate as a pupil from among the one or more pupil candidates based on the brightness information of the background portion and based on relationship information indicating a relationship between the brightness information of the background portion and a size of the pupil; and identify, when the result of the comparing indicates that the brightness of the eye region is darker than the brightness of the background portion, the at least one pupil candidate from the one or more pupil candidates based on another relationship information indicating a relationship between the brightness information of the eye region and the size of the pupil. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A non-transitory computer-readable storage medium storing a detection program for causing a computer to execute a process, the process comprising:
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detecting one or more pupil candidates from a face image region corresponding to a face of a subject in an image that includes a subject based on specific shape information; identifying an eye region in the image; comparing brightness information of the eye region with brightness information of a background portion of the image that excludes the face of the subject; identifying, when a result of the comparing indicates that a brightness of the eye region is brighter than a brightness of the background portion of the image that excludes the face of the subject, at least one pupil candidate as a pupil from among the one or more pupil candidates based on the brightness information of the background portion and based on relationship information indicating a relationship between the brightness information of the background portion and a size of the pupil; and identifying, when the result of the comparing indicates that the brightness of the eye region is darker than the brightness of the background portion, the at least one pupil candidate from the one or more pupil candidates based on another relationship information indicating a relationship between the brightness information of the eye region and the size of the pupil.
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Specification