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Video Navigator
Visual Search
Text Search
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If you would like to browse the video clips by subject
categories, visit the Video Navigator. If you have a particular subject
or object in mind (like lion), use the Text Search engine. Otherwise, if you are looking
for a particular feature, such as color, texture, motion, or shape in the
video clip, use the Visual Search engine to sketch out your ideas and query
the VideoQ database. Some examples using the Visual Search interface are
given under the Visual Search page.
Bandwidth Capacity
Each video clip is approximately ten seconds in duration and encoded as MPEG-1
video at three target bit rates. We adjust the bit rate by scaling the frame
size and frame rate of the video. To retrieve a video clip, you must specify
the target bit rate that matches your bandwidth capacity.
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Layer 1 video is encoded at 30
frames/second, requiring a T1 link (1200 kbps) for real-time retrieval. |
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Layer 2 video is encoded
at 7.5 frames/second, requiring an ISDN line (250 kbps) for real-time retrieval. |
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Layer 3 is encoded at 7.5
frames/second, requiring a 28.8 kbps modem for real-time
retrieval. |
Return Results
Each video query returns a ranked list of video keyframes, their associated
video clips, and a link to the original content provider.
Video keyframes have been extraced from the beginning of each video clip.
White bounding boxes highlight video objects that were matched to the query
objects. Dash-line bounding boxes indicate matched regions that are not
included in the selected keyframe but will appear in other frames of
the video clip.
To the side of each keyframe is a link to the video clip which has
been encoded at the specified layer. The ID and real-time duration of each
video clip is also noted.
All the returned video clips have been watermarked. For more information
about the source of the original video, follow the links to the video
content provider.
Play a Video Clip
The returned video clips are MPEG encoded and can be played with
an MPEG viewer. There are many MPEG viewers available for free on the World
Wide Web for all the major platforms: Unix, PCs, and Macs. For a list of our
favorite ones, click here. Once a viewer is
downloaded and installed, you need to configure your browser to handle MPEG
video through the viewer.
For example, on the Unix systems, mpeg_play is a popular viewer.
Once it is downloaded and installed, you can configure your Netscape
browser by adding the following line under the General Preferences/Helpers menu:
set "video/mpeg" to "mpeg_play -quiet %s"
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