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Jeanny Herault
Institut National Polytechnique de Grenoble
Membership Number: 4
Address: 46 Av Félix Viallet, F-38000 GRENOBLE, France.
Email: Jeanny.Herault@inpg.fr
Phone: (33) 4 76 57 43 60
Fax: (33) 4 76 57 47 90
URL: http://www.lis.inpg.fr/

Biographical Sketch
Prof. Jeanny Hérault was born in Thouars in 1944. He graduated from Institut National Polytechnique de Grenoble as Engineer in Elecronics (1967) and obtained his PhD degree in 1970 from this institution. He obtained the degree of "Docteur es Sciences" from the Université Joseph Fourier and from the INPG, Grenoble in 1980. He is now full professor at Institut des Sciences et Techniques, Grenoble (of which he has been the director for 5 years). He teaches Signal and Image Processing at an engineer level and “Human visual perception” at a post-grade level.

His research interests are in artificial neural networks for signal and high-dimensional data processing (he initiated the seminal works on Blind Source Separation and on Curvilinear Component Analysis). Since 1989, he is interested in the modeling of biological vision, both on computational and cognitive aspects: models of the retina (spatio-temporal filtering, nonlinear and adaptive processing), silicon retinae and neuromorphic circuits, colour coding in the visual system, models of cortical coding and processing, models of visual perception. He is interested in engineering applications such as image analysis, motion estimation, scene categorization and Content-Based Image Retrieval.

He is author or co-author of over 200 papers in international journals, books and conferences, and he has been the advisor for 25 PhD theses, among them 11 were about vision. He has been coordinator of 2 European basic research projects and served as Expert at the EEC for ESPRIT projects. He is presently Director of the “Diplôme d’Etudes Approfondies de Sciences Cognitives” of Grenoble, a multidisciplinary post-grade level diploma covering the fields of artificial intelligence, signal and image processing together with biological and psychological aspects of Human perception.

Institut National Polytechnique de Grenoble (Laboratory for Images and Signals - LIS)
The LIS (headed by Jean-Marc Chassery) is composed of five research groups ranging from (non-linear) signal processing to image processing, communication and specific computing architectures, comprising 86 researchers. Among these groups, the team “Visual Perception” headed by Jeanny Hérault has a long-track record in the cognitive modeling of Human vision.

Undertaken in the early 90’s, the functional analysis of the Primate’s retina led to a series of spatio-temporal, non-linear and adaptive filters useful for image and sequence preprocessing. From this work, the first french analog C-MOS silicon retinae have been realized by Prof. G. Bouvier. Further works, about the visual coding of colour in the retina have led (i) to an efficient algorithm for colour demosaicing, (ii) to a mean to account for the colourconstancy phenomenon, well known in human perception.

By using models of the primary visual cortex circuits with short range and long range interactions, together with psychophysical considerations, interesting algorithms have been derived as well for attentional processes (selection of regions of interest) as for the coding of local and global features (suitable for scene analysis). On this basis, a set of “cortical filters” are used for global scene characterization, in comparison to human results in scene perception. From these works, interesting approaches have been made to the indexation of static and dynamic scenes.

Recently, the team cooperates with a laboratory of experimental psychology. This collaboration reveals itself to be of fundamental importance: many of the problems addressed from the computer vision side may be given a new lightening by the psychological side and thus gain in understanding, leading to unforeseen solutions.


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