...

media abstraction


example -- image database



  states: { pic1.gif,...,picn.gif } 
  features: names of people 
  extraction: find people in pictures 
  relations: left-of, ...

example -- video database



  states:  set of frames 
  features:  persons and objects
  extraction:  gives features per frame 
  relations:  frame-dependent and frame-independent information
  inter-state relation:  specifies sequences of frames

simple multimedia database


structured multimedia database


...

SMDS -- functions



  Type: object  |->  type 
  ObjectWithFeatures:  f |-> { o |  object o contains  f }  
  ObjectWithFeaturesAndAttributes:  (f,a,v) |-> { o |  o contains f with  a=v }  
  FeaturesInObject:  o |-> { f | o  contains  f }  
  FeaturesAndAttributesInObject:  o |-> { (f,a,v) | o  contains  f  with  a=v }

SMDS-SQL



SELECT -- media entities

FROM

WHERE

example



    SELECT M
    FROM   smds source1 M
    WHERE  Type(M) = Image AND
  	 M IN ObjectWithFeature("Dennis") AND
  	 M IN ObjectWithFeature("Jane") AND
  	 left("Jane","Dennis",M)

hybrid representations: HM-SQL


differences


example HM-SQL



   SELECT M
   FROM smds video1, videodb video2
   WHERE M IN smds:ObjectWithFeature("Dennis") AND
         M IN videodb:VideoWithObject("Dennis")

digital libraries


Digital libraries are constructed -- collected and organized -- by a community of users. Their functional capabilities support the information needs and users of this community. Digital libraries are an extension, enhancement and integration of a variety of information institutions as physicalplaces where resources are selected, collected, organized, preserved and accessed in support of a user community.

... federated structures that provide humans both intellectual and physical access to the huge and growing worldwide networks of information encoded in multimedia digital formats.

digital libraries (5S)



   D-Lib Forum -- www.dlib.org
   Informedia -- www.informedia.cs.cmu.edu