A. Suganuma and T. Ashikawa (Japan)
Distance lecture, Detecting a chalking sound, Image processing, Estimating teacher's writing, Recording strategy
We are developing an Automatic Camera control system for Education: ACE, which captures a traditional lecture. ACE focuses on the latest object that a teacher writes on a blackboard. When this recording strategy is realized, it is necessary for ACE to detect beginning and ending of the teacher's writing. The early version of ACE mis-judges ending of his writing according to the region occluded by a teacher because it detects the region only using image pro cessing. In this paper, we describe a method of detecting the beginning and ending with both image and sound pro cessing. We have applied our method to recording a real lecture to validate it.
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