A methodology of highly interactive intra-object relevance feedback is used
to retrieve multimedia data from a database. The query object could
consist of one or more images, images derived from video, a video
sequence, or an audio clip. The query is adjusted using the information
fed-back by the user about the relevance of previously extracted part(s)
from the object itself, such that the adjusted query is a better
approximation to the user's perception. The information fed-back by the
user during intra-query modification is used for intra-object learning of
the user's perception. The refined query is subsequently used for
inter-object relevance feedback where data is retrieved from the database
based on parameters learnt by intra-query object feedback mechanism, and
the user provides feedback by ranking the retrieved objects in order of
their relevance to him or her. In the system according to the invention,
inter-object learning of user's perception is expedited by utilizing the
learnt parameters in the intra-object relevance feedback. Furthermore, the
methodology of the invention allows for building refined queries based on
part(s) or sub-sequence(s) of the query object rather than the entire
object itself, thereby reducing the number of irrelevant objects,
retrieved from the database. The methodology allows synthesis and
modification of the input query object itself in the event a query object
is not directly available, and, also to learn the user's perception.