| 摘要 |
Presence information for an object in a digital image is determined. An identifier associated with at least one object depicted in the image is allowed to be stored as image metadata. The identifier is sufficient to determine presence information from at least one of a presence application and a presence roster list. Presence information for the at least one object is determined based on the identifier from the at least one of a presence application and a presence roster list. An action related to the object is performed using the determined presence information. |
