Learning-focused structuring for blackboard lecture videos

Yu Tzu Lin*, Hsiao Ying Tsai, Chia Hu Chang, Greg C. Lee

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


Since blackboards are the standard in the classrooms and are still used today, blackboard lecture videos are common in the lecture video recordings. However, it has been known that content-based blackboard lecture video analysis is challenging and thereby rarely be touched upon in the field of semantic computing. In this paper, we proposed a new structuring method for blackboard lecture videos by estimating the learning focus that learners should pay more attention to. Both visual and aural analysis for blackboard lecture videos are utilized and integrated to develop a learning-focused attention model. As for the visual analysis, the fluctuation of written lecture content on the blackboard and the posture of lecturers are analyzed. On the other hand, the speech of lecturers is used for aural analysis. Finally, a learning-focused attention curve can be generated by fusing multiple attention models. In a sense, the values of the learning-focused attention reflect the strength of attention or semantics that the learners should pay to the blackboard lecture video and can be used for indicating the importance of the extracted lecture content at the corresponding time. Therefore, learners can easily access the blackboard lecture video with good flexibility to find what the lecture content they should understand and video frames to watch from the well-structured video. The experimental results show that the proposed method can effectively structure blackboard lecture videos and extract the lecture content with associated learning-focused attention values.

Original languageEnglish
Title of host publicationProceedings - 2010 IEEE 4th International Conference on Semantic Computing, ICSC 2010
Number of pages7
Publication statusPublished - 2010
Event4th IEEE International Conference on Semantic Computing, ICSC 2010 - Pittsburgh, PA, United States
Duration: 2010 Sept 222010 Sept 24

Publication series

NameProceedings - 2010 IEEE 4th International Conference on Semantic Computing, ICSC 2010


Other4th IEEE International Conference on Semantic Computing, ICSC 2010
Country/TerritoryUnited States
CityPittsburgh, PA


  • Lecture video analysis
  • Semantic analysis
  • Visual attention modeling

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Theoretical Computer Science


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