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


PACV 2007: IEEE Computer Society Workshop on

Photometric Analysis For Computer Vision

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


           http://pacv2007.inrialpes.fr/


======================================================

Scope:

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
      stereo)

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 http://pacv2007.inrialpes.fr/Scope.html 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

* Two Prizes are going to be awarded to the best papers of the workshop:

    - A Best Paper Award: $1,500.00
           (all the papers submitted are candidat)

    - A Best Student Paper Award:  $1,000.00
                   (only papers of which the first author is a PhD
                    candidate can apply to this award)


* Deadline for paper submission: August 3rd, 2007


======================================================

List of Important Dates:

Intention of submission                          July 30th, 2007

Deadline for paper submission  => there will be no deadline extension !

    **    August 3rd, 2007 - 11:00 AM UTC/GMT +1h        **

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


======================================================

Keywords:

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

======================================================

For more information please the workshop's web site:
http://pacv2007.inrialpes.fr/

======================================================



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

           General co-chairs and Organizers

=====================================================================