GAZE DETECTION APPARATUS AND GAZE DETECTION METHOD
First Claim
1. A gaze detection apparatus comprising:
- a light source which illuminates a user'"'"'s eye;
a first imaging unit which has a first angle of view, and generates a first image by capturing an image of the user'"'"'s face;
a second imaging unit which has a second angle of view narrower than the first angle of view, and generates a second image by capturing an image of at least a portion of the user'"'"'s face;
a face detection unit which detects from the first image a face region containing the user'"'"'s face;
a coordinate conversion unit which identifies on the second image a first region that corresponds to the face region or to an eye peripheral region detected from within the face region as containing the user'"'"'s eye;
a Purkinje image detection unit which detects a corneal reflection image of the light source and the center of the user'"'"'s pupil from within an eye region, identified based on the first region, that contains the user'"'"'s eye on the second image; and
a gaze detection unit which detects the user'"'"'s gaze direction or gaze position based on a positional relationship between the center of the pupil and the corneal reflection image.
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Abstract
A gaze detection apparatus includes: a first imaging unit which has a first angle of view and generates a first image; a second imaging unit which has a second angle of view narrower than the first angle of view, and generates a second image; a face detection unit which detects from the first image a face region; a coordinate conversion unit which identifies on the second image a first region corresponding to the face region or to an eye peripheral region containing the user'"'"'s eye; a Purkinje image detection unit which detects a corneal reflection image of a light source and the center of the user'"'"'s pupil from within an eye region, identified based on the first region; and a gaze detection unit which detects the user'"'"'s gaze direction or gaze position based on a positional relationship between the center of the pupil and the corneal reflection image.
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Citations
14 Claims
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1. A gaze detection apparatus comprising:
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a light source which illuminates a user'"'"'s eye; a first imaging unit which has a first angle of view, and generates a first image by capturing an image of the user'"'"'s face; a second imaging unit which has a second angle of view narrower than the first angle of view, and generates a second image by capturing an image of at least a portion of the user'"'"'s face; a face detection unit which detects from the first image a face region containing the user'"'"'s face; a coordinate conversion unit which identifies on the second image a first region that corresponds to the face region or to an eye peripheral region detected from within the face region as containing the user'"'"'s eye; a Purkinje image detection unit which detects a corneal reflection image of the light source and the center of the user'"'"'s pupil from within an eye region, identified based on the first region, that contains the user'"'"'s eye on the second image; and a gaze detection unit which detects the user'"'"'s gaze direction or gaze position based on a positional relationship between the center of the pupil and the corneal reflection image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A gaze detection method comprising:
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detecting a face region containing a user'"'"'s face from a first image generated by a first imaging unit having a first angle of view by a processor; identifying a first region on a second image generated by a second imaging unit having a second angle of view narrower than the first angle of view by the processor, wherein the first region corresponds to the face region or to an eye peripheral region detected from within the face region as containing the user'"'"'s eye; detecting a corneal reflection image of a light source illuminating the user'"'"'s eye and the center of the user'"'"'s pupil from within an eye region, identified based on the first region, that contains the user'"'"'s eye on the second image by the processor; and detecting the user'"'"'s gaze direction or gaze position based on a positional relationship between the center of the pupil and the corneal reflection image by the processor.
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14. A non-transitory computer-readable recording medium having recorded thereon a gaze detection computer program for causing a computer to execute:
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detecting a face region containing a user'"'"'s face from a first image generated by a first imaging unit having a first angle of view; identifying a first region on a second image generated by a second imaging unit having a second angle of view narrower than the first angle of view, wherein the first region corresponds to the face region or to an eye peripheral region detected from within the face region as containing the user'"'"'s eye; detecting a corneal reflection image of a light source illuminating the user'"'"'s eye and the center of the user'"'"'s pupil from within an eye region, identified based on the first region, that contains the user'"'"'s eye on the second image; and detecting the user'"'"'s gaze direction or gaze position based on a positional relationship between the center of the pupil and the corneal reflection image.
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Specification