Colorlab Workshop #7/2008: Dynamic range of light, contrast and perception in digital images
The workshop is organized by the Norwegian Color Research Laboratory and takes place at HiG (Høgskolen i Gjøvik – Gjøvik University College), in room K113, on Wednesday November 26th, 9.00-12.30 (plus experiment in the afternoon). It will have two invited speaker and four presentations.
The workshop is free, but participants are asked to register before November 24th, by email to natasja.bours@hig.no.
Motivation
In natural and artificial environments light has an extremely high variance of its physical characteristics. It varies very much in spectral composition, intensity, geometrical diffusion or reflection, together with the presence of transmission and refraction phenomena as well.
What our vision system or a camera captures is always a mixture of these characteristics of the light, distorted by the geometrical characteristic of the scene and the reflectance and diffusive properties of all the materials that compose it.
Among all these characteristics, the workshop aims at focusing on the dynamic range of light that the digital imaging field quite recently started to investigate. At the very beginning it has been considered just as a numerical extension of the digit range, but more complex phenomena have to be taken into account to understand end explore this phenomenon and to foster related research.
This workshop aims to propose a brief (not necessarily complete) overview on open issues, problems and possible solutions as a starting point of discussion for future direction of research.
Preliminary program
9.00 " Standard digital imaging and high dynamic range imaging
"
Alessandro Rizzi
9.20 " Capturing HDR images in the laboratory
" (INVITED)
Vien Cheung, Stephen Westland - School of Design, University of Leeds, UK
10.20 " Tone mapping tecniques
"
Gabriele Simone - Norwegian Color Research Laboratory - HiG
10.40 " Retinal signal in HDR images
"
Alessandro Rizzi, John McCann and Ivar Farup
11.00 " Capturing and seeing HDR visual information
"
Peter Nussbaum, Sole Aditya and Alessandro Rizzi - Norwegian Color Research Laboratory - HiG
11.20 “ An artists’ approach to the interpretation of luminance and reproduction of coloured shadows through pigment colour mixing
” (INVITED)
Carinna Parraman – University of the West of England, UK
A Panel Discussion will conclude the workshop
In the afternoon will take place the experiment described in Peter Nussbaum lecture
