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US 8,571,255 B2Granted
Scalable media fingerprint extraction
AssigneeDolby Laboratories Licensing Corporation
InventorsClaus Bauer, Regunathan Radhakrishnan, Wenyu Jiang, Glenn N. Dickins
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Abstract
Derivation of a fingerprint includes generating feature matrices based on one or more training images, generating projection matrices based on the feature matrices in a training process, and deriving a fingerprint for one or more images by, at least in part, projecting a feature matrix based on the one or more images onto the projection matrices generated in the training process.
Claims14
A computer-implemented method comprising:
- generating a plurality of projection matrices in a training process, wherein the training process comprises:
- generating a plurality of feature matrices based on one or more training images;
- projecting the plurality of feature matrices onto a plurality of candidate matrices to obtain a plurality of projected values for each of the plurality of candidate matrices;
- and
- selecting a subgroup of the plurality of candidate matrices as the projection matrices based on cross-correlation values between the plurality of projected values for each of the projection matrices;
- and
- deriving a fingerprint codeword for one or more images, wherein deriving the fingerprint codeword for the one or more images comprises projecting a feature matrix based on the one or more images onto the plurality of projection matrices generated in the training process.
4 more elements
Dependencies are inferred from the claim text.