Face detection in mid-shot digital images
First Claim
Patent Images
1. A method for detecting a face in a mid-shot digital image of a person, the method comprising:
- using a lens, image sensor and processor of a digital image acquisition and processing apparatus,capturing first and second mid-shot digital images of approximately a same scene that is known to include at least a face and a portion of a torso of a human person, including using different capture settings such that the foreground is differently differentiated from the background in each image,comparing the first and second images to determine the foreground region of the images, andidentifying a portion of the foreground region likely to correspond to a face based upon matching one or more known face-to-torso geometric relationships to one or more geometric relationships between regions of the foreground region of the first and second images.
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Abstract
A method for detecting a face in a mid-shot digital image of a person comprises capturing first and second mid-shot digital images of nominally the same scene using different capture settings such that the foreground is differently differentiated from the background in each image, and comparing the first and second images to determine the foreground region of the images. A portion of the foreground region likely to correspond to a face is estimated based upon the geometry of the foreground region.
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Citations
25 Claims
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1. A method for detecting a face in a mid-shot digital image of a person, the method comprising:
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using a lens, image sensor and processor of a digital image acquisition and processing apparatus, capturing first and second mid-shot digital images of approximately a same scene that is known to include at least a face and a portion of a torso of a human person, including using different capture settings such that the foreground is differently differentiated from the background in each image, comparing the first and second images to determine the foreground region of the images, and identifying a portion of the foreground region likely to correspond to a face based upon matching one or more known face-to-torso geometric relationships to one or more geometric relationships between regions of the foreground region of the first and second images. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A digital image acquisition and processing apparatus comprising:
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means for capturing first and second mid-shot digital images of approximately a same scene that is known to include at least a face and a portion of a torso of a human person, including using different capture settings such that the foreground is differently differentiated from the background in each image, means for comparing the first and second images to determine the foreground region of the images, and means for identifying a portion of the foreground region likely to correspond to a face based upon matching one or more known face-to-torso geometric relationships to one or more geometric relationships between regions of the foreground region of the first and second images.
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10. One or more non-transitory processor-readable media having code embedded therein for programming a processor to perform a method for detecting a face in a mid-shot digital image of a person, wherein the method comprises:
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using a lens, image sensor and processor of a digital image acquisition and processing apparatus, capturing first and second mid-shot digital images of approximately a same scene that is known to include at least a face and a portion of a torso of a human person, including using different capture settings such that the foreground is differently differentiated from the background in each image, comparing the first and second images to determine the foreground region of the images, and identifying a portion of the foreground region likely to correspond to a face based upon matching one or more known face-to-torso geometric relationships to one or more geometric relationships between regions of the foreground region of the first and second images. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A digital image acquisition and processing apparatus, comprising:
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a lens; an image sensor; a processor; and a processor-readable medium having code embedded therein for programming the processor to perform a method for detecting a face in a mid-shot digital image of a person, wherein the method comprises; capturing first and second mid-shot digital images of approximately a same scene that is known to include at least a face and a portion of a torso of a human person, including using different capture settings such that the foreground is differently differentiated from the background in each image, comparing the first and second images to determine the foreground region of the images, and identifying a portion of the foreground region likely to correspond to a face based upon matching one or more known face-to-torso geometric relationships to one or more geometric relationships between regions of the foreground region of the first and second images. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification