Treatment of laser pointer and speech information in lecture scene retrieval

We have previously proposed a unified presentation contents search mechanism named UPRISE (Unified Presentation Slide Retrieval by Impression Search Engine), and have also proposed a method to use laser pointer information in lecture scene retrieval. In this paper, we discuss the treatment of the laser pointer and speech information, and propose two methods to filter the laser pointer information using keyword occurrence in slides and speech. We also propose weighting schemata with filtered laser pointer information using slide text and speech information. We evaluate our approach by using actual lecture videos and presentation slides.