Passive capture and structuring of lectures
MULTIMEDIA '99 Proceedings of the seventh ACM international conference on Multimedia (Part 1)
CueVideo: automated multimedia indexing and retrieval
MULTIMEDIA '99 Proceedings of the seventh ACM international conference on Multimedia (Part 2)
Multi-modal information retrieval from broadcast video using OCR and speech recognition
Proceedings of the 2nd ACM/IEEE-CS joint conference on Digital libraries
Indexing and Search of Multimodal Information
ICASSP '97 Proceedings of the 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP '97) -Volume 1 - Volume 1
Object Recognition from Local Scale-Invariant Features
ICCV '99 Proceedings of the International Conference on Computer Vision-Volume 2 - Volume 2
Augmented segmentation and visualization for presentation videos
Proceedings of the 13th annual ACM international conference on Multimedia
VAST MM: multimedia browser for presentation video
Proceedings of the 6th ACM international conference on Image and video retrieval
Slide image retrieval: a preliminary study
Proceedings of the 8th ACM/IEEE-CS joint conference on Digital libraries
Hierarchical fuzzy feature similarity combination for presentation slide retrieval
EURASIP Journal on Advances in Signal Processing
Application of Information Retrieval Technologies to Presentation Slides
IEEE Transactions on Multimedia
Proceedings of the 2011 ACM Symposium on Applied Computing
Viewing by interactions: media-oriented operators for reviewing recorded sessions on tv
Proceddings of the 9th international interactive conference on Interactive television
Automatic authoring of interactive multimedia documents via media-oriented operators
ACM SIGAPP Applied Computing Review
Browsing interaction events in recordings of small group activities via multimedia operators
Proceedings of the 18th Brazilian symposium on Multimedia and the web
An automated analysis and indexing framework for lecture video portal
ICWL'12 Proceedings of the 11th international conference on Advances in Web-Based Learning
Real-time direct manipulation of screen-based videos
Proceedings of the companion publication of the 2013 international conference on Intelligent user interfaces companion
PEDIVHANDI: multimodal indexation and retrieval system for lecture videos
ACCV'12 Proceedings of the 11th Asian conference on Computer Vision - Volume Part II
Bag of subjects: lecture videos multimodal indexing
Proceedings of the 2013 ACM symposium on Document engineering
Content-based copy and paste from video documents
Proceedings of the 2013 ACM symposium on Document engineering
Hi-index | 0.00 |
The design and implementation of a search engine for lecture webcasts is described. A searchable text index is created allowing users to locate material within lecture videos found on a variety of websites such as YouTube and Berkeley webcasts. The index is created from words on the presentation slides appearing in the video along with any associated metadata such as the title and abstract when available. The video is analyzed to identify a set of distinct slide images, to which OCR and lexical processes are applied which in turn generate a list of indexable terms. Several problems were discovered when trying to identify distinct slides in the video stream. For example, picture-in-picture compositing of a speaker and a presentation slide, switching cameras, and slide builds confuse basic frame-differencing algorithms for extracting keyframe slide images. Algorithms are described that improve slide identification. A prototype system was built to test the algorithms and the utility of the search engine. Users can browse lists of lectures, slides in a specific lecture, or play the lecture video. Over 10,000 lecture videos have been indexed from a variety of sources. A public website will be published in mid 2010 that allows users to experiment with the search engine.