METHODS AND APPARATUSES FOR HALF-FACE DETECTION
First Claim
1. A method comprising steps of:
- determining a left-face probability based at least in part on an application of one or more left-face classifiers to an image;
determining a right-face probability based at least in part on an application of one or more right-face classifiers to the image;
based at least in part on both the left-face probability and the right-face probability, determining that (a) the image contains a full face, (b) the image contains a left face without a right face, (c) the image contains a right face without a left face, or (d) the image does not contain a face;
wherein the steps are performed by an automated device.
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Accused Products
Abstract
Classifier chains are used to determine quickly and accurately if a window or sub-window of an image contains a right face, a left face, a full face, or does not contain a face. After acquiring a digital image, an integral image is calculated based on the acquired digital image. Left-face classifiers are applied to the integral image to determine the probability that the window contains a left face. Right-face classifiers are applied to the integral image to determine the probability that the window contains a right face. If the probability of the window containing a right face and a left face are both greater than threshold values, then it is determined that the window contains a full face. Alternatively, if only one of the probabilities exceeds a threshold value, then it may be determined that the window contains only a left face or a right face.
37 Citations
30 Claims
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1. A method comprising steps of:
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determining a left-face probability based at least in part on an application of one or more left-face classifiers to an image; determining a right-face probability based at least in part on an application of one or more right-face classifiers to the image; based at least in part on both the left-face probability and the right-face probability, determining that (a) the image contains a full face, (b) the image contains a left face without a right face, (c) the image contains a right face without a left face, or (d) the image does not contain a face; wherein the steps are performed by an automated device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A volatile or non-volatile computer-readable storage medium storing instructions which, when executed by one or more processors, cause the processors to perform steps comprising:
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determining a left-face probability based at least in part on an application of one or more left-face classifiers to an image; determining a right-face probability based at least in part on an application of one or more right-face classifiers to the image; based at least in part on both the left-face probability and the right-face probability, determining that (a) the image contains a full face, (b) the image contains a left face without a right face, (c) the image contains a right face without a left face, or (d) the image does not contain a face. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A digital camera comprising:
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an image capturing and storing module; a left-face classifier module that determines a left-face probability based at least in part on an application of one or more left-face classifiers to an image; a right-face classifier module that determines a right-face probability based at least in part on an application of one or more right-face classifiers to the image; and an image labeling module that determines, based at least in part on both the left-face probability and the right-face probability, whether (a) the image contains a full face, (b) the image contains a left face without a right face, (c) the image contains a right face without a left face, or (d) the image does not contain a face. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification