Contactar Johannes Martinus Hubertina du Buf
Hans (J.M.H.) du Buf
I started at the HTS Venlo (The Netherlands), a sort of polytechnic, in electrical engineering. See nostalgia(in Dutch). Then I did my MSc at the Techical University of Eindhoven in 1983. I obtained my PhD, working at the Institute for Perception Research (IPO), from the same University in 1987. I worked for 7 years at the Swiss Federal Institute of Technology in Lausanne (EPFL) before moving to the University of the Algarve in Faro, Portugal, in March 1994. I am associate professor; my teaching includes digital systems, computer architecture, computer graphics as well as image processing.
My PhD was on visual psychophysics, more specifically on the perception of brightness and contrast of spatial patterns, and the modeling of visual perception. This work later evolved into texture segmentation by using Gabor filters as a model of so-called cortical simple and complex cells, the role of Gabor phase information for an accurate detection of lines and edges in images, and then also cortical end-stopped cells for detecting keypoints (line and edge crossings, junctions). This has lead to multi-scale line, edge and keypoint representations which can be used for object categorisation and recognition.
Ongoing work focuses on developing advanced biological models for optical flow (object- and egomotion), stereo disparity, focus-of-attention and gist vision with spatial layout: which types of objects are about where in a visual scene. The goal is to integrate all models on a mobile platform with a stereo camera, also two microphones for sound-source localisation and recognition, with sequencing of atomic visuomotor actions. This is called cognitive robotics, which also integrates short- and long-term memories, egospace, and hierarchical maps for local and global navigation. If you scan the publication list you'll see that painterly rendering, i.e., translating photographs into paintings using models of perception, is another activity. This may result in research concerning colour emotions, image abstraction and visual aesthetics.
I was the coordinator of the European diatom project ADIAC. The final scientific report: Automatic Diatom Identification, H du Buf and MM Bayer (eds), World Scientific, Series in Machine Perception and Artificial Intelligence, Vol. 51, 2002. DETAILS.
I am Associate Editor of the Int J of Pattern Recognition and Artificial Intelligence: IJPRAI.