| 摘要 |
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for performing facial recognition. In one aspect, a method includes accessing a first digital photograph. A first face template is generated for each face detected in the first digital photograph. Second user identifiers that are associated with a first user identifier are determined. A digital photograph index of photographs, user identifiers, and areas in the digital photographs in which a face of a user identified by user identifier is located is accessed. Second user identifiers are selected, and second face templates are generated from the faces of the user the digital photographs. First face templates that match second face templates are identified, and for each first face template that matches a second face template, data is generated specifying the area in the first digital photograph in which the face of the second user is located. |
| 主权项 |
1. A method performed by data processing apparatus, the method comprising: accessing, at a data processing apparatus,
a first digital photograph;
generating a first face template for each face detected in the first digital photograph by analyzing facial features of the one or more faces;determining second user identifiers that are associated with a first user identifier, the first user identifier and the second user identifiers identifying users;accessing, to retrieve areas of stored digital photographs, a digital photograph index that specifies, for each of one or more stored digital photographs indexed by one or more stored user identifiers, an area in the stored digital photograph in which a face of a user identified by the stored user identifier is located;selecting second user identifiers, and for each of the selected second user identifiers, generating a second face template by analyzing facial features of the faces of the user in the areas of the stored digital photographs indexed by the selected second user identifier;identifying first face templates that match second face templates; andfor each first face template that matches a second face template, generating data specifying the area in the first digital photograph in which is located the face of the second user identified by the second user identifier of the second face template, wherein each of the face templates is temporarily stored in non-persistent memory and removed from the non-persistent memory after identifying the first face templates that match the second face templates. |
