Brief CV of J.M.H. (Hans) du
Updated May 2011
- Born March 29, 1951, in Venlo (The Netherlands). Married 3rd of August
1972. Adopted two Colombian children in 1985. Moved to Renens near
Lausanne, Switzerland, March 1987. Moved to Faro, Portugal, March 1994.
- Still of Dutch nationality.
- Hobbies: long walks, cooking, noncommercial movies,
some literature, modern music, collecting antique microscope slides
and, last but not least, a structural lack of time to do all this.
- Graduated from the Technical Highschool (HTS Venlo), Electrical
Engineering, in 1973. The final year project was done at the University
of Nijmegen, Laboratory of General Physiology (ECG analysis).
- Graduated from the Eindhoven University of Technology, Electrical
Engineering, in 1981. This study was interrupted one year by military
service. Major courses were on
stochastic system theory, signal processing, Fourier optics and
Student projects were on FIR linear-phase filter
design and implementation, performed at the Physiological Psychology Group
of Tilburg University,
and noncoherent Fourier-optical filter synthesis by means of autocorrelation
functions, performed at the Theoretical Electrical Engineering Group of the
Eindhoven University of Technology.
The Master's subject was on digital image processing of ultrasound B-scan
images. This work included the development of a generally applicable
software package for image handling, as well as image enhancement
inverse filtering to improve the lateral beam resolution, and statistical
texture analysis. This work was performed at the Biophysical Laboratory
of the Ophtalmological Department, University of Nijmegen Hospital.
- From 1982 to 1986 engaged by the Dutch Organisation for the Advancement of
Pure Research, Foundation for Biophysics, to investigate the nonlinear
spatial transfer characteristics of the human visual system. This
psychophysical work was done at the Institute for Perception Research,
which was a collaboration between the Eindhoven University of Technology
and the Philips Physics Laboratory, and fully dedicated to perception
research, which resulted in a PhD obtained in 1987.
Main issues were the measurement of spatial detection thresholds and
suprathreshold curves of iso-brightness and apparent iso-contrast,
as well as the modeling of threshold and suprathreshold spatial vision
by means of nonlinear multichannel models.
- From 1987 to 1994 engaged by the Swiss Federal Institute of
Technology (EPF-Lausanne), Signal Processing Laboratory, to do research on
unsupervised texture segmentation. This work bears heavily on the image
representation in the primary visual cortex, and concentrates on the
use and modeling of the local Gabor power spectrum. An innovative aspect
was the use of the Gabor phase spectrum for the discrimination of
highly structured textures, which requires 2D phase unwrapping.
More recent work involved the study of complex
moments of the Gabor power spectrum for the detection of structures with
- In March 1994 engaged as Invited Associate Professor at the Dept.
of Electronics and Computer Science, Faculty of Sciences and Technology,
University of Algarve (Faro, Portugal). Since February 2005 he is a normal
Associate Professor at UAlg. Teaching
concerns digital systems and computer architecture at the BSc level, and
computer graphics and image processing at MSc level.
- At the moment, his UALG Vision Laboratory counts 2 postdocs,
5 PhD students, 6 MSc students and 1 undergrad student,
who are all working on different aspects of
image processing, computer graphics, parallel computing, vision modelling and
now also cognitive robotics.
All equipment of the lab has been acquired by means of project funding.
Funded projects etc.
- Current work, which already started while still being at the EPFL,
concentrates on the detection and discrimination
of different types of lines and edges by combining the Gabor power and
phase spectrum. Problems under study are ambiguous neighbourhoods where
different lines/edges cross or are very close, the detection and
discrimination of structures like vertices (keypoints) with a high accuracy and
certainty, visual reconstruction, and the modeling of psychophysical data sets
concerning brightness perception as well as visual illusions.
The goal is to obtain a complete syntactical image representation which
combines local and global (area) attributes, employing a multiscale
data-driven approach. In ongoing work the multiscale line, edge and keypoint
representations are used for developing cortical models for global and local
gist vision, overt and covert attention, invariant object categorisation and
recognition, optical flow and disparity, and 3D face recognition. The models
are being implemented on mobile robot platforms with a stereo camera and two
microphones (for binaural source localisation), in the context of cognitive
robotics: from high-level task scheduling to low-level automatic sequencing
of atomic visuomotor actions.
- His first project was funded by the Fonds national suisse de la recherche
scientifique; grant No. 21-33641.92.
Title: High definition image analysis and synthesis; start Oct 1992, duration 2
years plus 2 years prolongation; budget SFR 175,600.
- Prof. du Buf was a partner in the European PAMONOP research network,
in the context of the EC Human Capital and Mobility programme.
The central theme was Modeling neural operators for
pattern recognition. (1994 to 1996, local budget 36,000 euros)
- Prof. du Buf was a partner in the MAST3 project ISACS (Integrated
System for the Analysis and Characterization of the Seafloor). Start:
March 1996; duration 3.5 years; local budget 250,000 euros. The task
was to develop efficient 3D interpolation and segmentation
algorithms for underwater acoustic data, together with the development of new,
interactive, 3D scientific visualization methods. A common element in the interpolation,
segmentation and surface rendering is the use of quad- and octrees.
- Prof. du Buf had, together with Prof. Todd Reed from the Univ. California at
Davis, a NATO Collaborative Research Grant CRG 971584: The analysis of
acoustic data via 3-D segmentation.
- Prof. du Buf was a partner in the Portuguese-funded project SETNA-ParComp,
which aimed at developing scalable algorithms for computer vision on
MPP systems (i.e. Parsytec CC and Beowulf clusters). Local budget about 3.8 Mescudo
for 3 years. Start: August 1997.
- Prof. du Buf was the Coordinator of the MAST3 project ADIAC
(Automatic Diatom Identification and Classification). Start May 1998,
duration 3 years; 7 European partners; total budget 1,254,000 euros; local budget
200,000 euros. The final scientific report of the project was published as a book.
- Prof. du Buf was a partner in the INCO-DC project AMOVIP
(Advanced Modeling of Visual Information Processing). This project aimed
at developing methods for pattern
recognition in relation to human vision with collaborations between
Spain, Portugal, Mexico, and Brazil.
Start March 1998, duration 3.5 years, local budget 110,000 euros.
- Funded Portuguese project MOVIDE (Modeling Visual Detection),
FCT/MCT (Lisbon), POCTI/36445/PSI/2000, start October 2000, duration 3
years, budget 70,000 euros. Goal: to develop 2D detection
models that can explain many different data sets, including
Modelfest data and Contrast Interrelation Functions.
- In collaboration with Joao Paulo Costeira (ISR Lisbon): funded
Portuguese project 3D Modeling from Video, FCT/MCT (Lisbon),
start 2001, duration 3 years, budget 70,000 euros.
Goal: to develop 3D scene construction and sequence coding.
- Prof. du Buf was a partner of the STREP EXOCET/D (Extreme ecosystem studies in the
deep ocean: Technological developments). Start 2004, duration 3 years, 13 partners.
Total budget 2 Meuro, local budget 101 Keuro. UALG's task was to construct 3D
terrain maps from acoustic data and to study the classification of vegetation.
- Prof. du Buf was coordinator of the FCT project SmartVision, which aims at
developing a visual aid for the blind with global navigation (GPS and GIS at UTAD
Campus) and local navigation (walkable path and obstacle negotiation). Start Jan.
2008, duration 3.5 years, total budget 160 Keuro.
- Prof. du Buf is coordinator of the new FCT project Blavigator, which is
a follow-up of SmartVision for developing a real prototype system using cheap
off-the-shelf components. Start June 2011, duration 2 years, total budget 70 Keuro.
- Prof. du Buf participates in the EU-FP7-funded project NeuralDynamics,
coordinated by Prof. Gregor Schoener at the Institut fuer Neuroinformatik, Ruhr
Univ. Bochum (Germany). The project counting four partners, our role is to develop cortical
models for object and scene representations guided by attention.
Start April 2011, duration 4 years, total budget 3 Meuro.
Memberships and other activities:
- Associate editor of the International Journal of Pattern Recognition and Artificial
- Member of IEEE Computer Society
- Member of the Portuguese Association for Pattern Recognition (APRP)
- Integrated in the Institute for Systems and Robotics (ISR) at the Tecnico
- Presented invited lectures at:
1 Neurologisches Institut, University of Freiburg (Prof. Spillmann)
2 Laboratory for Image Analysis University of Aalborg (Prof. Granum)
3 Psychologisches Institut III der Westfaelischen
Wilhelms-Universitaet Muenster (Prof. Mortensen)
4 Institut fuer Neuroinformatik, Lehrstuhl fuer Theoretische
Biologie der Ruhr-Universitaet Bochum (Profs von Seelen and von der
5 Institut fuer Arbeitsphysiologie an der Universitaet Dortmund
(Prof. Cavonius, Dr Ehrenstein)
6 Institut fuer Physiologische Psychologie, Lehrstuhl II:
Experimentelle und klinische Neuropsychologie an der
Heinrich-Heine Universitaet Duesseldorf (Prof. Wist, Dr Schrauf)
At McGill University in Montreal:
7 Vision Research Centre at the Dept of Ophthalmology
(Profs Hess, Kingdom, Baker, Mullen)
8 Computer Vision and Robotics Laboratory (Prof. Zucker)
9 Institute for Medical Psychology, University of Muenchen
(Prof. Rentschler, Dr. Zetzsche)
- Regularly reviewing papers for journals like Signal Processing
(and the EUSIPCO conference), IEEE-PAMI, IEEE Computer Vision, IEEE Image
Processing, IEEE Systems, Man, and Cybernetics, Pattern Recognition (Letters),
the Int. J. of Pattern Recogn. and Artif. Intell. (IJPRAI), Biological
Cybernetics, Behavioral and Brain Sciences, IEE Proceedings on Vision,
Image and Signal Processing, IEE Electronics Letters, etc.
- Publications: Prof. du Buf is (co)author of 33 journal papers and
90 conference papers. See the complete and updated
Go back to the Hans du Buf homepage
or visit the UAlg Vision Laboratory.
Last update: May 2011 - HdB