Human detection method and apparatus
First Claim
1. A method of detecting a person from an image provided by a digital video camera, the method comprising:
- (a) initializing parameters used for a user detection;
(b) determining a current mode from a face detection mode and a motion detection mode, said face detection mode and said motion detection mode being alternative modes relative to one another;
(c) when it is determined that the current mode is the face detection mode, performing a face detection on each of a plurality of image frames, and when a face is not detected even after a predetermined number of face detection trials, selecting a motion detection mode and going back to step (b); and
(d) when it is determined that the current mode is the motion detection mode, performing a motion detection on a predetermined number of image frames at a time, and when at least a predetermined number of motion detections are performed successfully within a predetermined period of time, going back to step (a).
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Abstract
A human detection method and apparatus are provided. In the method, a person is detected from an image provided by a digital video camera. The method includes (a) initializing parameters used for a user detection; (b) determining a current mode; (c) when it is determined that the current mode is the face detection mode, performing a face detection on each of a plurality of image frames, and when a face is not detected even after a predetermined number of face detection trials, selecting a motion detection mode and going back to step (b); and (d) when it is determined that the current mode is the motion detection mode, performing a motion detection on a predetermined number of image frames at a time, and when at least a predetermined number of motion detections are performed successfully within a predetermined period of time, going back to step (a).
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Citations
30 Claims
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1. A method of detecting a person from an image provided by a digital video camera, the method comprising:
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(a) initializing parameters used for a user detection; (b) determining a current mode from a face detection mode and a motion detection mode, said face detection mode and said motion detection mode being alternative modes relative to one another; (c) when it is determined that the current mode is the face detection mode, performing a face detection on each of a plurality of image frames, and when a face is not detected even after a predetermined number of face detection trials, selecting a motion detection mode and going back to step (b); and (d) when it is determined that the current mode is the motion detection mode, performing a motion detection on a predetermined number of image frames at a time, and when at least a predetermined number of motion detections are performed successfully within a predetermined period of time, going back to step (a). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus for detecting a person from an image provided by digital video camera, the apparatus comprising:
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means for initializing parameters used for a user detection; detection mode determination means for determining a current mode from a face detection mode and a motion detection mode, said face detection mode and said motion detection mode being alternative modes relative to one another; face detection means for performing a face detection on each of a plurality of image frames when it is determined that the current mode is a face detection mode and selecting a motion detection mode when a face is not detected even after a predetermined number of face detection trials; and motion detection means for performing a motion detection on a predetermined number of image frames at a time when it is determined that the current mode is motion detection mode and initializing the parameters when at least a predetermined number of motion detections are performed successfully within a predetermined period of time. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification