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This paper introduces a novel framework for implicit media content annotation by putting the user in the loop of the annotation process. In particular, a ser of visual features are extracted to describe the visual properties of the media content. Then, as the user plays with the content by downloading a set of media data, a mechanisms associates the textual user's queries with the visual metadata...
Web-based image search engines and CBIR techniques are blind to the actual content. As a result querying for a specific object is often cluttered with irrelevant data, leading to low precision. Furthermore recall rates are also very low since retrieval procedures are usually based either on context (surrounding text) and file captions or on low-level visual features. In this paper an automatic multi-agent...
We use a Markovian model to capture the habitual user profiles of an information access system. In this model, the general as well as the individual for each user, profile is captured in the form of a Markovian process where the states are the keywords asked to the system by the users and a transition from state to state corresponds to the order theses keywords appeared in the queries. Under this...
In this paper, an affine invariant watermarking scheme, robust to geometric attacks, is proposed and applied to face regions. Initially, face regions are unsupervisedly extracted from an initial image and a normalization procedure, invariant to geometric attacks is applied on each of these regions using a set of specific moment criteria. A spread spectrum-based DS-CDMA watermarking scheme is then...
A novel human face watermarking scheme is proposed in this paper, providing copyright protection of semantic content. To achieve this goal, skin detection is initially performed using a skin filter, which relies on color information and then, face extraction is achieved using a combination of a morphological filter and a human face template. An invariant watermark is then designed and tested against...
Current multimedia databases contain a wealth of information in the form of audiovisual as well as text data. Even though efficient search algorithms have been developed for either media, there still exists the need for abstract presentation and summarization of the results of database users' queries. Moreover, multimedia retrieval systems should be capable of providing the user with additional information...
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