Rule-based combination of a hierarchy of classifiers for occlusion detection
First Claim
Patent Images
1. An occlusion detection system, comprising:
- a decomposer configured to decompose an image into a set of hierarchical parts;
a hierarchy of classifiers, including multiple view-based classifiers, employed to detect features in the image and the hierarchical parts; and
at least one logical operation configured to logically combine a classification result from at least two of the classifiers to detect an occlusion state of the image by detennining that no face is detected in an image that has a detected person.
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Abstract
An occlusion detection system and method include a decomposer configured to decompose an image into a set of hierarchical parts. A hierarchy of classifiers is employed to detect features in the image and the hierarchical parts. A logical operation is configured to logically combine a classification result from at least two of the classifiers to detect an occlusion state of the image.
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Citations
32 Claims
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1. An occlusion detection system, comprising:
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a decomposer configured to decompose an image into a set of hierarchical parts; a hierarchy of classifiers, including multiple view-based classifiers, employed to detect features in the image and the hierarchical parts; and at least one logical operation configured to logically combine a classification result from at least two of the classifiers to detect an occlusion state of the image by detennining that no face is detected in an image that has a detected person. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 32)
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9. A person detection system, comprising:
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a face detector configured to detect a face in an input video sequence by interleaving of multiple view-based classifiers, the face detector outputting a face keyframe to be stored if a face is detected; a person detector configured to detect a person in the input video sequence if the face detector fails to detect a face, the person detector outputting a person keyframe to be stored, if a person is detected in the input video sequence. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for occlusion detection, comprising:
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decomposing an image into a set of hierarchical parts; detecting features in the image and the hierarchical parts using a hierarchy of classifiers, including multiple view-based classifiers; and logically combining classification results from at least two of the classifiers to detect an occlusion state of the image by determining that no face is detected in an image that has a detected person. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A computer program product for occlusion detection comprising a non-transitory computer useable storage medium including a computer readable program, wherein the computer readable program when executed on a computer causes the computer to perform the steps of:
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decomposing an image into a set of hierarchical parts; detecting features in the image and the hierarchical parts using a hierarchy of classifiers, including multiple view-based classifiers; and logically combining classification results from at least two of the classifiers to detect an occlusion state of the image by determining that no face is detected in an image that has a detected person.
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Specification