Linking presentation documents using image analysis

Systems for recording presentations are becoming commonly available. Commercial solutions include authoring tools that let users create online representations by recording audio, video, and presentation slides while a talk is being given. A typical collection of presentation recordings may contain hundreds even thousands of recordings, making it very difficult to retrieve particular presentations and find specific points in the presentation. This paper describes a retrieval technique that utilizes the digital camera pictures taken during presentations. An enabling image matching algorithm is also described. The algorithm utilizes the text and the layout of presentation slides captured in different multimedia streams and documents. Experimental results show that our method yields to a high retrieval accuracy.