Near-infrared method and system for use in face detection
First Claim
1. A method for use in detecting a face of a person, the method comprising:
- providing image data representative of reflected light of a scene in at least a first and second bandwidth within a reflected infrared radiation range;
extracting regions of the scene in the image data representative of reflected light of the scene in the first bandwidth within the reflected infrared radiation range which correspond to one or both eyebrows of a person;
extracting regions of the scene in the image data representative of reflected light of the scene in the second bandwidth within the reflected infrared radiation range which correspond to one or both eyes of the person;
combining the extracted regions of the scene which correspond to one or both eyebrows of the person with the extracted regions of the scene that correspond to one or both eyes of the person resulting in a composite feature image; and
searching the composite feature image based on model data representative of an eye region to detect one or both eyes of the person.
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Abstract
A method and system for use in detecting a face of a person includes providing image data representative of reflected light of a scene in at least one bandwidth within a reflected infrared radiation range. Regions of the scene in the image data which may correspond to one or both eyebrows of a person and which may correspond to one or both eyes of the person are extracted from the data. The extracted regions which may correspond to one or both eyebrows of the person are combined with the extracted regions that may correspond to one or both eyes of the person resulting in a composite feature image. The composite feature image is searched based on model data representative of an eye region to detect one or both eyes of the person.
251 Citations
42 Claims
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1. A method for use in detecting a face of a person, the method comprising:
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providing image data representative of reflected light of a scene in at least a first and second bandwidth within a reflected infrared radiation range; extracting regions of the scene in the image data representative of reflected light of the scene in the first bandwidth within the reflected infrared radiation range which correspond to one or both eyebrows of a person; extracting regions of the scene in the image data representative of reflected light of the scene in the second bandwidth within the reflected infrared radiation range which correspond to one or both eyes of the person; combining the extracted regions of the scene which correspond to one or both eyebrows of the person with the extracted regions of the scene that correspond to one or both eyes of the person resulting in a composite feature image; and searching the composite feature image based on model data representative of an eye region to detect one or both eyes of the person. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for use in detecting a face of a person, the system comprising:
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at least one imaging device operable to provide image data representative of reflected light of a scene in at least a first and second bandwidth within a reflected infrared radiation range; and processing apparatus operable to; extract regions of the scene in the image data representative of reflected light of the scene in the first bandwidth within the reflected infrared radiation range which correspond to one or both eyebrows of a person; extract regions of the scene in the image data representative of reflected light of the scene in the second bandwidth within the reflected infrared radiation range which correspond to one or both eyes of the person; combine the extracted regions of the scene which correspond to one or both eyebrows of the person with the extracted regions of the scene that correspond to one or both eyes of the person resulting in a composite feature image; and search the composite feature image based on model data representative of an eye region to detect one or both eyes of the person. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method for use in detecting a face of a person, the method comprising:
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providing a first image output representative of reflected light of a scene in a first bandwidth within a reflected infrared radiation range; providing a second image output representative of reflected light of a scene in a second bandwidth within a reflected infrared radiation range; defining at least a facial search area by isolating skin of a person in the scene relative to background based on the first and second image output, wherein a difference in reflectance for human skin in the first bandwidth relative to the second bandwidth is greater than a difference in reflectance for objects in the background other than human skin in the first bandwidth relative to the second bandwidth; extracting regions in the defined facial search area which correspond to one or both eyebrows of the person, wherein the regions that correspond to one or both eyebrows of the person have a comparatively higher reflectivity in the first bandwidth than the reflectivity of human skin; and extracting regions in the defined facial search area which correspond to one or both eyes of the person, wherein the regions that correspond to one or both eyes of the person have a comparatively lower reflectivity in the second bandwidth than the reflectivity of human skin; combining the extracted regions of the scene which correspond to one or both eyebrows of the person with the extracted regions of the scene that correspond to one or both eyes of the person resulting in a composite feature image; searching the composite feature image based on model data representative of an eye region to locate one or more eye containing regions; and estimating the center of one or both eyes within the one or more eye containing regions. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification