Division 8: Image Technology

TC8-04: Adaptation under Mixed Illumination Conditions

Quartely Progress Report (1998/Oct -1999/Feb.)

by Naoya Katoh @ Sony Corporation, Japan - TC Chair

Gathered interested members;

• Dr. Janos Schanda from University of Veszprem, Hungary
• Dr. Paula J. Alessi (CIE TC1-27 Chair) from Eastman Kodak Company, USA
• Dr. Klara Wenzel from Technical Univ. of Budapest, (also of Coloryte), Hungary
• Ms. Monica Billger from Chalmers Univ. of Tech., Sweden
• Dr. Peyma Oskoui from HP Labs., USA
• Naoya Katoh from Sony Corporation, Japan - TC8-04 Chair

We now have six members; three from Europe, two from USA, and one from Japan.

Established a maling alias (CIE_8_4@color.sony.co.jp) to communicate among the TC members, and opened up TC's web page (http://www.colour.org/tc8-04/) to let other people understand what this TC is working on.

Katoh et al., published "Effect of ambient light on the color appearance of softcopy images: Mixed chromatic adaptation for self-luminous displays" on J. Electronic Imaging, Vol. 7, No. 4, pp794-806 (Oct. 1998), which could be a starting point of this TC's work. Remaining considerations are;

• which chromatic adaptation transformation should be applied (Hunt-Pointer-Esteves, Bradford, or others; as in Section 3.2)
• how to incorporate "incomplete adaptation" (as in Section 3.3.1),
• any possible improvements for "mixed adaptation" (as in Section 3.3.2)
• what kind of images should be used for the cross-examination (natural images, CG images, uniform patches, etc).

TC chair hopes to prepare draft experimental guideline for cross-examinations and past research survey by the end of March 1999.