HEAD MOVEMENT DETECTION APPARATUS
First Claim
1. A head movement detection apparatus comprising:
- an image capture unit that captures a facial image of a subject;
a trajectory acquisition unit that acquires a trajectory of a facial feature point of the subject over time from a sequence of facial images captured by the image capture unit;
a storage unit that stores a set of features of a trajectory of the facial feature point of the subject during a specific head movement made by the subject, the trajectory being acquired by the trajectory acquisition unit from a sequence of facial images captured by the image capture unit during the specific head movement made by the subject; and
a head movement detection unit that detects the specific head movement made by the subject on the basis of a degree of correspondence between the set of features of the trajectory previously stored in the storage unit and a corresponding set of features of a trajectory acquired by the trajectory acquisition unit.
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Abstract
A head movement detection apparatus capable of more reliably detecting a head movement of a subject. In the apparatus, an image capture unit captures a facial image of the subject. A trajectory acquisition unit acquires a trajectory of a facial feature point of the subject over time from a sequence of facial mages captured by the image capture unit. A storage unit stores a set of features of a trajectory of the facial feature point during a specific head movement made by the subject. A head movement detection unit detects the specific head movement made by the subject on the basis of a degree of correspondence between the set of features of the trajectory previously stored in the storage unit and a corresponding set of features of a trajectory acquired by the trajectory acquisition unit.
19 Citations
18 Claims
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1. A head movement detection apparatus comprising:
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an image capture unit that captures a facial image of a subject; a trajectory acquisition unit that acquires a trajectory of a facial feature point of the subject over time from a sequence of facial images captured by the image capture unit; a storage unit that stores a set of features of a trajectory of the facial feature point of the subject during a specific head movement made by the subject, the trajectory being acquired by the trajectory acquisition unit from a sequence of facial images captured by the image capture unit during the specific head movement made by the subject; and a head movement detection unit that detects the specific head movement made by the subject on the basis of a degree of correspondence between the set of features of the trajectory previously stored in the storage unit and a corresponding set of features of a trajectory acquired by the trajectory acquisition unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A head movement detection apparatus comprising:
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an image capture unit that captures a facial image of a subject; a trajectory acquisition unit that acquires a trajectory of a facial feature point of the subject over time from a sequence of facial images captured by the image capture unit; a storage unit that stores a trajectory of the facial feature point of the subject during a specific head movement made by the subject, the trajectory being acquired by the trajectory acquisition unit from a sequence of facial images captured by the image capture unit during the specific head movement made by the subject; and a head movement detection unit that detects the specific head movement made by the subject on the basis of a degree of correspondence between the trajectory previously stored in the storage unit and a trajectory acquired by the trajectory acquisition unit. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification