According to one embodiment, a content analysis module receives content information of a content item, the content information including a plurality of first keywords associated with the content item. The content analysis module performs an analysis on the first keywords associated with the content item. A keyword classifier categories the first keywords into a plurality of categories based on the analysis, each category including one or more second keywords selected from the first keywords. For each of the categories, one or more images are identified based on the corresponding second keywords. A category/image mapping module generates a category/image mapping table for the content item to map each of the categories to the corresponding identified images. The category/image mapping table is utilized to match the content item to one of the images based on a subsequent category determined in response to a search query.