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AISB event Bulletin Item

Call for papers: Photometric Analysis For Computer Vision (PACV) workshop at ICCV 2007

==================  CALL FOR PAPER ===================

PACV 2007: IEEE Computer Society Workshop on

Photometric Analysis For Computer Vision

(in conjunction with ICCV 2007, Rio de Janeiro, Brasil)




The way an image looks like depends on many factors, including geometry, 
illumination and reflectance properties of the objects. For the 
transparent or translucent objects, or for the objects composed by 
multiple coatings, the factors are even more numerous (refraction, 
subsurface scattering,...). The laws combining these components are very 
diverse and complex. This complexity makes computer vision tasks even 
more difficult and practically causes the failure of methods based on 
too simple models.

A typical example could be the troubles caused by the specularities in 
the stereovision problem; proposed methods usually assume that the scene 
in perfectly diffuse. Feature tracking/matching is another example since 
the photometric appearance of the objects can change when they/the 
camera move/es.

 From the theoretical as well as from the computational point of view, a 
better understanding and handling of these factors and of their 
combinations should allow to be robust to the photometric effects. In 
fact this allows us to go beyond: it allows not only to overcome the 
inconveniences problems they involve but it can also be an 
information/constraints source which can be practically exploited in 
computer vision tasks. We can think for example about the shading and 
shadow information.

More synthetically, the topics of interest include, but are not limited 
to, the following:
* Theoretical Analysis:
         - image invariants,
         - characterization of ambiguities (e.g. viewpoint-lighting
	  ambiguity, characterization of the solutions of a problem).
         - number of images required for solving computer vision tasks.

* Insensitivity to the appearance changes:
         - image invariants.
         - taking into account appearance changes in models (e.g. in 3D
	  reconstruction, feature matching/tracking, segmentation).

* Separation/reconstruction:
         - recovering reflectance properties and lighting conditions for
     	  realistic changes of point of view
         - improvement of images: removing highlights, religthing,
     	  modification of the albedo (application: advertisement)...

* Exploitation:
         - exploitation of shading and shadows (e.g. in Shape from
           Shading, in stereovision when point correspondance is
           difficult or impossible)
         - exploitation of the appearance changes (e.g. in photometric

The spectrum of considered applications covers
	shape estimation, radiance/lighting estimation,
	feature extraction, feature matching/tracking, object
           tracking/recognition, segmentation,
	recovery of complete and high quality models,...

See for more details.


* The workshop proceedings will be published by the IEEE Computer Society.

* Selected Papers from the Workshop will appear in a special issue of 
the International Journal of Computer Vision

* A Prize is going to be awarded to the best paper(s) of the workshop.

* Deadline for paper submission: August 3rd, 2007


List of Important Dates:

Intention of submission                      	July 30th, 2007
Deadline for paper submission          		August 3rd, 2007
Notification of acceptance                 	September 14th 2007
Camera-ready copies due to            		September 30th, 2007
Conference dates                             	October 14th-21th, 2007
Journal submission                          	January, 2008.


Organizing Committee:

      Peter Belhumeur, Program Chair, Columbia University, USA
      Katsushi Ikeuchi, Program Chair, University of Tokyo, Japan
      Emmanuel Prados, Organizer & General Co-Chair, INRIA, France
      Stefano Soatto, General Chair, UCLA, USA
      Peter Sturm, Organizer & Program Chair, INRIA, France

Program Committee:

     Edward H. Adelson
     Ronen Basri
     Daniel Cremers
     Mark S. Drew
     Graham Finlayson
     David Forsyth
     William T. Freeman
     Theo Gevers
     Edwin R. Hancock
     Anders Heyden
     David W. Jacobs
     Jan J. Koenderink
     Ryszard S. Kozera
     David J. Kriegman
     Kyros Kutulakos
     Mike Langer
     Sang Wook Lee
     Hendrik Lensch
     Steve Lin
     Shree K. Nayar
     Marc Pollefeys
     Jean Ponce
     Yoichi Sato
     Steven Seitz
     Jan Erik Solem
     Todd Zickler



   -  Photometry, illumination and reflectance,  non Lambertian 
reflection, specularities, ambient lighting, interreflection, vignetting,
   -  Transparent objects, semi-transparency, refraction, subsurface 
   -  Colour constancy, chromaticity, multicolored illuminations,
   -  Ambiguities, image invariants,
   -  Model-based vision...


For more information please the workshop's web site:


    Peter Belhumeur,  Katsushi Ikeuchi,  Emmanuel Prados,
            Stefano Soatto,      Peter Sturm.

            General co-chairs and Organizers