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Method, system, and computer program for identification and sharing of digital images with face signatures

  • US 8,750,574 B2
  • Filed: 12/30/2008
  • Issued: 06/10/2014
  • Est. Priority Date: 12/31/2007
  • Status: Active Grant
First Claim
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1. A method for recognizing one or more faces in a digital image, the method comprising:

  • a. generating one or more face coordinates corresponding to one or more candidate regions for one or more candidate faces, the face coordinates generating comprising;

    initiating a first texture-based detection routine on the digital image to detect one or more candidate face regions, each candidate face region defined by respective face coordinates;

    applying a skin color detection test to the one or more candidate face regions to eliminate one or more of the candidate faces that fail the skin color detection test, if any;

    reducing the size defined by the face coordinates of the of the one or more candidate face regions to a predefined size;

    initiating a second texture-based detection routine on each size-reduced candidate face region to define a set of positively identified face objects and uncertain face objects; and

    defining further positively identified face objects, if any, by rotating the digital images associated with the uncertain face objects;

    b. generating eye coordinates based on the face coordinates of each positively identified face object;

    c. detecting each face using one or more projection images defined by the face coordinates of each positively identified face object and the eye coordinates; and

    d. comparing each projection image with one or more known projection images, wherein a similarity threshold is provided for defining a best match between the projection image and the known projection images.

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