Imperial College London > Talks@ee.imperial > COMMSP Seminar > 3D Object Retrieval using Visual Computing Techniques

3D Object Retrieval using Visual Computing Techniques

Add to your list(s) Download to your calendar using vCal

  • UserDr Theoharis Theoharis, Department of Informatics, University of Athens, Greece
  • ClockMonday 28 June 2010, 14:00-14:59
  • HouseGabor Seminar Room, 611.

If you have a question about this talk, please contact Danilo Mandic.

As the size of information repositories increases, the importance of retrieval operations rises. This partly explains the success of internet search engines. The type of information object gradually changes and becomes more complex. Starting from huge text collections, we have moved to large image collections. More recently, aided by the proliferation of three-dimensional scanners and modeling software, collections of three-dimensional models (referred to as ‘objects’ here) are also rapidly expanding. Some collections contain objects of various classes (e.g. furniture) while others are more specialized and contain objects of a single class (e.g. human faces for biometric applications).

In this talk we present the state-of-the-art on accurate and efficient inter-class object retrieval, based on both two-dimensional and three-dimensional characteristics of shape. When such inter-class retrieval methods are applied to intra-class problems, the results are quite poor. In intra-class retrieval it is necessary to exploit the specific characteristics of the class in order to discriminate the minute shape differences that exist between objects belonging to the same class. An intra-class retrieval method, based on a parameterized and annotated class model, is also presented. Its state-of-art results in face and ear recognition are given. The intra-class method took part in the Face Recgnition Grand Challenge and achieved the top accuracy score in the shape-only class of the US Face Recognition Vendor Test.

Bio: Theoharis Theoharis received the BSc. degree in Computer Science from the University of London in 1984, the MSc. Degree in Computation from the University of Oxford in 1985 and the Ph.D. degree in Computer Graphics and Parallel processing from the University of Oxford in 1988. He served as a Research Fellow at the University of Cambridge between 1987 and 1990 and as a Consultant with Andersen Consulting between 1992 and 1993. He is with the Department of Informatics, University of Athens and has an Adjunct appointment at the University of Houston. His main research interests lie in 3D Shape Similarity (with applications in Biometrics, Object Retrieval, Archaeological Reconstruction) and Computer Graphics.

This talk is part of the COMMSP Seminar series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

 

Changes to Talks@imperial | Privacy and Publicity