Face recognition using evolutionary algorithms
First Claim
1. A face recognition system, comprising:
- a face recognizer that is configured to identify a face in a target image, based on a set of characterizing parameters, anda parameter set selector, operably coupled to the face recognizer, that is configured to select the set of characterizing parameters from among a plurality of sets of characterizing parameters, for use by the face recognizer, based on an identifier of an environment from which the target image is obtained.
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Abstract
A system and method wherein the parameters used for face recognition are determined via an evolutionary algorithm, such as a genetic algorithm. Candidate sets of parameters are evaluated for face recognition performance in a given environment. The most effective sets of parameters are used to generate offspring sets of parameters, and these offspring sets are subsequently evaluated for face recognition performance. This process is repeated, with each generation of offspring sets inheriting attributes of the most successful sets, until the system converges on a set of parameters that exhibits superior performance for the given environment. In like manner, other sets of parameters are determined for other environments. When the face recognition system is deployed, the appropriate set of parameters is used, dependent upon the environment in which the target images originate. In this manner, the system exhibits superior performance in each of the environments in which it is deployed.
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Citations
18 Claims
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1. A face recognition system, comprising:
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a face recognizer that is configured to identify a face in a target image, based on a set of characterizing parameters, and a parameter set selector, operably coupled to the face recognizer, that is configured to select the set of characterizing parameters from among a plurality of sets of characterizing parameters, for use by the face recognizer, based on an identifier of an environment from which the target image is obtained. - View Dependent Claims (2, 3, 4, 5)
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6. A system for determining a preferred set of characterization parameters for face recognition, comprising:
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a face recognizer that is configured to provide an identifier of a face in a target image, based on a set of characterization parameters, an evaluator, operably coupled to the face recognizer, that is configured to determine a measure of effectiveness of the set of characterization parameters, based on an accuracy of the identifier, and an evolutionary algorithm, operably coupled to the evaluator, that is configured to provide alternative sets of characterization parameters to the face recognizer for subsequent determinations of measures of effectiveness for these alternative sets of characterization parameters by the evaluator, wherein; the alternative sets of characterization parameters are based on measures of effectiveness of prior sets of characterization parameters, and the evolutionary algorithm is further configured to identify the preferred set of characterization parameters, based on the measures of effectiveness of each set of characterization parameters of the alternative sets and prior sets of characterization parameters. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A method comprising
determining a preferred set of characterization parameters for face recognition by: -
generating a first population of sets of characterization parameters, evaluating each member set of the first population of sets, to provide a measure of effectiveness of each member set of the first population of sets, based on an accuracy of identifying each face in a plurality of test target images, generating a second population of sets of characterization parameters, based on the measure of effectiveness of each member set of the first population of sets, evaluating each member set of the second population of sets, to provide a measure of effectiveness of each member set of the second population of sets, based on a subsequent accuracy of identifying each face in the plurality of target images, and determining the preferred set of characterization parameters, based at least in part on the measure of effectiveness of each member set of the first and second populations of sets. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification