Method and apparatus for probabilistic image analysis
First Claim
1. A method of analyzing an image comprising:
- acquiring a first surface area of a surface location of an image of a person to be analyzed;
retrieving a second surface area of the same surface location of a reference image;
comparing characteristic values of said first surface area and said second surface area;
calculating a score from said comparison, said score representing a likelihood that said first and second surface areas are from the same person.
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Abstract
Embodiments of the present invention are directed to a method and apparatus for probabilistic image analysis. In one embodiment, an image is normalized and filtered. A determination is made regarding the likelihood of the image randomly matching characteristics of the reference image. If the likelihood is smaller than a threshold, the system determines that the image and the reference image match. In one embodiment, the likelihood is determined by using patches of skin in the images. In one embodiment, the likelihood is derived from the coherence of the optical flow computed between the two images. In one embodiment, the image is partitioned into a plurality of pixel regions. A pixel region in one image is mapped to a best-fit region in the other image. A neighbor region of the pixel region is mapped to a best-fit pixel region in the other image. The positional relationship between the pixel region and its neighbor is compared with the positional relationship between the two best-fit pixel regions
209 Citations
13 Claims
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1. A method of analyzing an image comprising:
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acquiring a first surface area of a surface location of an image of a person to be analyzed;
retrieving a second surface area of the same surface location of a reference image;
comparing characteristic values of said first surface area and said second surface area;
calculating a score from said comparison, said score representing a likelihood that said first and second surface areas are from the same person. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of analyzing an image comprising:
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acquiring a first surface area of a surface location of an image of a person to be analyzed;
retrieving a second surface area of the same surface location of a reference image;
comparing a pattern of luminance of said first surface area with a pattern of luminance of said second surface area;
calculating a score from said comparison, said score representing a likelihood that said first and second surface areas are from the same person. - View Dependent Claims (9)
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10. A method of analyzing an image comprising:
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acquiring a first surface area of a target image of a person to be analyzed;
retrieving a second surface area of a reference image;
morphing said first surface area to said second surface area;
identifying a match when said morphing step is accomplished in a a reasonable manner.
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11. A method of analyzing an image comprising:
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acquiring a first surface area of a target image of a person to be analyzed;
retrieving a second surface area of a reference image;
computing an optical flow required between said first surface area and said second surface area;
identifying a match when said optical flow is reasonable.
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12. A method of triggering a computer to select one of a plurality of environments, each environment associated with one of a plurality of users comprising:
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scanning a zone near said computer with a camera, said camera receiving an image of said zone;
identifying a presence of a person in said zone;
comparing attributes of said person with attributes of said plurality of users;
initializing an environment associated with said person when said attributes of said person match attributes of one of said plurality of users. - View Dependent Claims (13)
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Specification