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;
(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).
98 Citations
40 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;
(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. A method of detecting a motion from an image provided by a digital video camera, the method comprising:
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(e1) receiving a predetermined number of image frames;
(e2) detecting a motion in the image frames using the temporal edge detection algorithm and variance of pixel values with respect to time;
(d3) determining whether a motion has been detected; and
(d4) when it is determined that a motion has been detected, storing the image. - View Dependent Claims (17, 18, 19, 20)
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21. An apparatus for detecting a person from an image provided by digital video camera, the apparatus comprising:
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a means for initializing parameters used for a user detection;
a detection mode determination means for determining a current mode;
a face detection mode 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
a 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 not the face 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 (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. An apparatus of detecting a motion from an image provided by a digital video camera, the apparatus comprising:
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a means for receiving a predetermined number of image frames;
a means for detecting a motion in the image frames using the temporal edge detection algorithm and variance of pixel values with respect to time;
a means for determining whether a motion has been detected; and
a means for storing the image when it is determined that a motion has been detected. - View Dependent Claims (37, 38, 39, 40)
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Specification