Unified Presentation Contents Retrieval Using Laser Pointer Information

We have proposed unifying presentation contents, such as lecture video and presentation slides used in lectures, using metadata. For the unified contents, we have also proposed a search mechanism named UPRISE (Unified Presentation Slide Retrieval by Impression Search Engine). In this paper, we focus on the position, count, and duration information of a laser pointer, and propose a retrieval method using the information. In proposed method, we extract the position of laser pointer from video, and choose a sentence near the laser pointer position with a number of candidates. We evaluate our approach by applying it to actual presentation contents.