Technique | SequentialSummaryExtractionTool |
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Document | N3705 MPEG-7 CD MDS, see Sequential Summaries |
Name | Osamu Hori, Toshimitsu Kaneko, Koji Yamamoto (Toshiba R&D Center) |
osamu.hori@toshiba.co.jp, toshimitsu.kaneko@toshiba.co.jp, koji7.yamamoto@toshiba.co.jp | |
Contact | osamu.hori@toshiba.co.jp |
Type | Application |
External Libraries | ImageMagick library and mpeg2decode with extraction of motion vectors. |
Related Ds/DSs | SummaryDS, SequentialSummaryDS, FramePropertyD |
Used Ds/DSs | NONE |
Input | MPEG-Video (foo.mpg), MPEG frame information file (frameinfo.txt) MPEG frame information file is a text file consist of three sections. [VideoSkim] : File name of the video skim file. [I-pictures] : Listing of the I-picture frames. [P-pictures] : Listing of the P-picture frames. [Regions] : Listing of the frames with region data. The syntax for the region data is: frame# imagefile left top width height |
Extraction | Yes |
Client Appl | NA |
Summary | This component generates a smart quick view, i.e., fast playback with automatic speed control using thumbnail data and frame activity value. The thumbnail data is shrinked I-picture frame images, given by a video skim (a composite of still-images). Frame activity value is calculated from the motion vectors in the P-picture frames. The frame numbers of I and P-pictures have to be described in the frame information file because they are not extracted automaticaly. Region data is used to describe the region of interest. |
Strong Points | Regarding speed, it work best when the input mpeg video is not longer than 30 minutes. |
Limitations | Processing time can be very long when the input mpeg video is long. |
Parameters | NA |