Information Technology Reference
In-Depth Information
Time and date tags represent temporal information of multimedia objects.
Such information can also be used to choose resources. Here is an example.
If a tourist visits a place in the morning, he or she may also want to access
photos or video taken in the evening. Since tourists usually do not stay at the
same location all day, the time attribute of multimedia resources can help
users to have a look at scenes in different hours. The date is also used for the
same purpose. If users at a specified location in the spring, they may want
to view photos of the same scene in winter. Retrieving resources according
to time and date tags can fulfill such requirements.
The tags of media type include audio, image, and video. The management
server can use this tag to classify multimedia objects into three categories.
For every type of object, the client application needs to have an adequate
means to present them to users. The final part is description of objects.
Using descriptions for retrieving resources is another way for users to make
advanced queries. There is little difference from the tags mentioned above.
Since descriptions are totally generated by users' input, casual descriptions
may lead to bad query results.
Such tags can be used to help users quickly find resources they want. There
is little difference from information collected from agents and the resources
mentioned above. Information collected from agents presented to users is
in a more complete form. They are presented mainly in Web pages. These
pages may be captured from Web pages of travel topics of other tourists.
These multimedia resources can be considered a minimal unit to help users
to augment contents of their travel records.
Information of users' history is also stored and analyzed in the
management server. Data and records collected from users can help
tourists to produce a schedule for their next journey. Besides informa-
tion presented in users' personal profiles, they can access other traveling
records provided by other users. By referencing these data, tourists can
find suitable locations for their next journey by comparing data records
of other users. In the management server, every procedure of uploading
multimedia resources will be considered as a basic record. By analyzing
these records, locations visited by users can be stored. A simple approach
is adopted for computing the similarity of two users' traveling record in
the server.
• : Visited locations by users
n
U
• : Number of visited locations of user 1
n
• : Number of visited locations of user 2
S
• : Grade of similarity of the two users
Getting similarity of two users'
record (
U
1
,
U
2
)
Loop
l
1
:
i
1 ~
n
