Professor Joseph RONSIN, from Institut National des Sciences Appliquées (INSA- Institute for Applied Sciences) in Rennes, visited the School of Information Science and Engineering. He gave a lecture on image representation and compression, and will give lectures in the next two weeks.

Professor Joseph RONSIN obtained a M.Sc. in Electronics from the University of Rennes, France, in 1972. He joined, as a lecturer of INSA- Rennes, and obtained his D.Sc. in 1977. He became Directeur de Recherches in 1989 and Professor one year later. Joseph RONSIN is now Professor in the Department of Electronic and Computer engineering of INSA and is responsible for research of Image and Remote sensing group of Institut d’Electronique et Télécommunications de Rennes (IETR- Institute of Electronics and Telecommunications of Rennes). The IETR brings together research teams working in the fields of electronics and telecommunications at the University of Rennes 1 and INSA. With more than 300 people, the unit is linked to French National Center for Scientific Research (CNRS) and places the emphasis on developing the skills needed to explore a wide range of emerging applications.

Professor Joseph RONSIN has been responsible for several industrial grants with state or private Laboratories, in the fields of Image analysis or Image compression. He is author of more than 130 publications and communications.

IMAGE REPRESENTATION and COMPRESSION

Lectures are dedicated to source coding of still images and video. These lectures must permit the apprehension of the essential aspects of representation and compression for images. Representation has the objective of a reduction of corresponding data. After some brief reminders on Information Theory and human vision, then using Signal Theory, main coding techniques will be presented and illustrated. Standards for still images: JPEG and JPEG 2000 will be introduced with also standards for video: MPEG-1,2,4. Exercises will be developed in parallel, on one hand at the blackboard and on the other hand with dedicated software.

OUTLINES

1. Introduction to Image Compression

2. Reminders of Information Theory, Lossless Compression

3. Quantization

4. PCM

5. DPCM

6. TRANSFORM CODING

7. JPEG

8. JPEG 2000

9. Video and standards MPEG 1/2/4

10. MPEG4/AVC

These lectures, whose content corresponds approx. to 36h, will be alternated with exercises on blackboard and practical work on software.