On Mon, 24 Jan 2011 14:47:51 -0700 Brian Bolt <[email protected]> wrote:
> Hi All, > > Our Echo system adds a new thumbnail every time there's a new > slide/visual on the screen, but no one thumbnail can represent more > than 5 minutes of video, and I am looking for information on how > Matterhorn determines when to create a new thumbnail slide. > Matterhorn seems to use similar logic, but I've noticed that > thumbnails are not always created, especially if the new window is > not maximized to take up the whole screen. > > Thanks, > Brian Hi Brian, It uses band-based frame differencing with a threshold to determine when a scene has changed. Lots of room for improvement in our scene detection right now, and I'm hopeful there will be some changes for 1.2... Chris -- Christopher Brooks, BSc, MSc ARIES Laboratory, University of Saskatchewan Web: http://www.cs.usask.ca/~cab938 Phone: 1.306.966.1442 Mail: Advanced Research in Intelligent Educational Systems Laboratory Department of Computer Science University of Saskatchewan 176 Thorvaldson Building 110 Science Place Saskatoon, SK S7N 5C9 _______________________________________________ Matterhorn-users mailing list [email protected] http://lists.opencastproject.org/mailman/listinfo/matterhorn-users
