Vision-based operating method and system
First Claim
1. A method of determining whether an acquired image matches a reference image, comprising:
- acquiring a digital image for comparison to a reference image;
identifying two or more groups of pixels in the acquired image;
selecting pixel groups in the reference image that are the best match for the two or more pixel groups in the acquired image;
comparing the relative locations of the selected pixel groups in the reference image and the two or more pixel groups in the acquired image; and
determining the probability that the relative locations occurred randomly.
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Abstract
A vision-based operating system is provided in which a computer-based system accepts visual inputs and takes appropriate actions in a wide variety of environments. One environment is a security environment in which the vision-based operating system acquires an image of a face and determines, with an arbitrarily small probability of a false positive, whether the face is of a person who is authorized to enter the environment. The method employed may include acquiring a digital image for comparison to a reference image and identifying two or more groups of pixels in the acquired image. The pixel groups in the reference image that are the best match for the two or more pixels groups in the acquired image are selected. The relative locations of the selected pixel groups in the reference image and the two or more pixel groups in the acquired image are compared, and the probability that the relative locations occurred randomly is determined.
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Citations
26 Claims
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1. A method of determining whether an acquired image matches a reference image, comprising:
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acquiring a digital image for comparison to a reference image; identifying two or more groups of pixels in the acquired image; selecting pixel groups in the reference image that are the best match for the two or more pixel groups in the acquired image; comparing the relative locations of the selected pixel groups in the reference image and the two or more pixel groups in the acquired image; and determining the probability that the relative locations occurred randomly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15)
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14. A system for determining whether an acquired image matches a reference image, comprising:
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a camera configured to acquire a digital image for comparison to a reference image; an identification module configured to identify two or more groups of pixels in the acquired image; a selection module configured to select pixel groups in the reference image that are the best match for the two or more pixel groups in the acquired image; a comparison module configured to compare the relative locations of the selected pixel groups in the reference image to the two or more pixel groups in the acquired image; and a calculator configured to determine the probability that the relative locations occurred randomly. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. 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; identifying two or more groups of pixels in said first surface area; selecting groups of pixels from said second surface area that are a best match for said two or more groups of pixels in said first surface area; comparing the relative locations of said pixel groups in said first and second surface areas; determining a probability that the relative locations occurred randomly; and calculating a score representing a likelihood that said first and second surface areas are from the same person.
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Specification