A relevance feedback approach to video genre retrieval

Content-based retrieval in video databases has become an important task with the availability of large quantities of data in both public and proprietary archives. Most of video systems are based on feature classification, but problems appear because of “semantic gap” between high-level human concepts and the machine-readable low-level visual features. In this paper we adopt a relevance feedback approach (RF) to bridge the semantic gap by progressively collecting feedback from the user, which allows the machine to discover the semantic meanings of objects or events. Experimental tests conducted on more than 91 hours of video footage show an improvement of up to 90% in retrieval accuracy, compared to classic classification-based retrieval.