1. A method of object retrieval from visual data, the method comprising: annotating at least one portion of the visual data with a context keyword corresponding to an object, wherein the annotating is performed responsive to recognition of the context keyword by performing speech recognition in audio data corresponding to the at least one portion of the visual data; receiving a query to retrieve the object, wherein the query comprises a query keyword associated with both the object and the context keyword; identifying the at least one portion of the visual data based on the context keyword; and searching for the object in the at least one portion of the visual data using an appearance model corresponding to the query keyword.
2. The method of claim 1 , wherein the appearance model, the corresponding query keyword, and the context keyword are predetermined.