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Efficient propagation for face annotation

  • US 7,403,642 B2
  • Filed: 04/21/2005
  • Issued: 07/22/2008
  • Est. Priority Date: 04/21/2005
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method, comprising:

  • selecting digital images;

    assigning a name to the digital images; and

    propagating the name from the digital images to a face of an individual represented in each of the digital images;

    wherein the propagating includes applying a similarity measure;

    to define an objective function as a sum of similarities between multiple features of each pair of faces of the individual in different selected images, andto maximize the objective function in order to associate the name with the face in each image; and

    wherein applying the similarity measure includes integrating the multiple features into a Bayesian framework according to;

    S

    ( F 1 , F 2 )
    =

    j = 1 N f




    p

    ( Δ





    f i
    | Ω

    I
    )


    p

    ( Ω

    I
    )


    i = 1 N f




    p

    ( Δ





    f i
    | Ω

    I
    )


    p

    ( Ω

    I
    )
    +

    j = 1 N f




    p

    ( Δ





    f i
    | Ω

    E
    )


    p

    ( Ω

    E
    )
    where p(Ω

    I) and p(Ω

    E) are a priors, Δ

    fi=(fi1

    fi2), and p(Δ

    fi

    I) and p(Δ

    fi

    E) are the likelihoods of a given difference Δ

    fi between the features.

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