Record Details

Automatic capsule preparation for lecture video

DSpace at IIT Bombay

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Field Value
 
Title Automatic capsule preparation for lecture video
 
Creator RAM, AR
CHAUDHURI, S
 
Subject segmentation
recognition
entropy
hmm
hpp
content
highlight
video-capsule
 
Description In this paper, we propose a visual quality and content based approach for creating a lecture video capsule which essentially contains the highlights of the original lecture video. We first segment and recognize the activities in the instructional video using a hidden Markov model(HAIM). The activities are classified into three categories : talking head, writing hand and slide show. Then a no-reference objective quality assessment of the non-content frames, i.e., talking head frames, are performed to detect a few high quality frames for highlight creation. A new method of defining the visual quality of content frames, i.e., writing hand and slide show frames which are very crucial in a lecture video, is proposed in this paper. Statistical parameters of the intensity histogram along with the horizontal projection profile(HPP) of the the content frames are used to derive an objective quality measure of these frames. This allows us to extract the high quality content frames, which are 'well-written'. Finally on media re-creation to produce the video capsule, we select the video segments of a few seconds duration around these good quality frames along with the audio and merge with suitable proportion of the detected classes of instructional activity. This technique accounts for a very compact representation of the whole lecture video which finds a very potential application of video previews.
 
Publisher IEEE
 
Date 2011-10-25T03:52:46Z
2011-12-15T09:11:26Z
2011-10-25T03:52:46Z
2011-12-15T09:11:26Z
2009
 
Type Proceedings Paper
 
Identifier 2009 INTERNATIONAL WORKSHOP ON TECHNOLOGY FOR EDUCATION (T4E 2009),10-16
978-1-4244-5506-5
http://dx.doi.org/10.1109/T4E.2009.5314119
http://dspace.library.iitb.ac.in/xmlui/handle/10054/15594
http://hdl.handle.net/100/2064
 
Source 2nd International Workshop on Technology for Education (T4E 2009),Bangalore, INDIA,AUG 04-06, 2009
 
Language English