LINE-OF-SIGHT DETECTION APPARATUS
First Claim
Patent Images
1. A line-of-sight detection apparatus comprising:
- a plurality of light sources that radiate detection light to a face of a target person;
a camera that captures an image of the face of the target person; and
a control unit that computes a line-of-sight direction on a basis of the image captured by the camera,wherein the control unit performs;
an extraction step of extracting partial images of respective different portions of the face on the basis of the image captured by the camera;
a computation step of computing line-of-sight directions on a basis of the respective partial images; and
a selection step of selecting one of a plurality of computed line-of-sight directions that are obtained in different ways and from different partial images, in accordance with angle ranges of the line-of-sight directions.
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Abstract
In computation of a line-of-sight direction in a control unit, a first computed line-of-sight direction is obtained from the center of a pupil and a reflection point of cornea reflection light, a second computed line-of-sight direction is obtained by computing the ellipse shape of an iris or the pupil, and a third computed line-of-sight direction is obtained on the basis of a face orientation and the relative position of the iris or pupil in an eye. The line-of-sight direction can be computed over a wide range with high accuracy by selecting one of the computed line-of-sight directions.
15 Citations
13 Claims
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1. A line-of-sight detection apparatus comprising:
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a plurality of light sources that radiate detection light to a face of a target person; a camera that captures an image of the face of the target person; and a control unit that computes a line-of-sight direction on a basis of the image captured by the camera, wherein the control unit performs; an extraction step of extracting partial images of respective different portions of the face on the basis of the image captured by the camera; a computation step of computing line-of-sight directions on a basis of the respective partial images; and a selection step of selecting one of a plurality of computed line-of-sight directions that are obtained in different ways and from different partial images, in accordance with angle ranges of the line-of-sight directions. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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2. A line-of-sight detection apparatus comprising:
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a plurality of light sources that radiate detection light to a face of a target person; a camera that captures an image of the face of the target person; and a control unit that computes a line-of-sight direction on a basis of the image captured by the camera, wherein the control unit performs; an extraction step of extracting partial images of respective different portions of the face on the basis of the image captured by the camera; a computation step of computing line-of-sight directions on a basis of the respective partial images; and a selection step of selecting, from among a plurality of computed line-of-sight directions that are obtained in different ways and from different partial images, one having a small variation as a correct computed line-of-sight direction. - View Dependent Claims (3, 10, 11, 12, 13)
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Specification