Division 8: Image Technology

TC8-04: Adaptation under Mixed Illumination Conditions

Progress Report No.3 (2000/Feb.)

by Naoya Katoh @ Sony Corporation, Japan - TC Chair

4.1 List of Members

Two new member* joined our TC; Ms. Itala Kucsera from Coloryte, Hungary and Dr. Peter Bodrogi, from University of Veszprem, Hungary. We now have ten members; six from Europe, three from USA, and one from Japan.

• Dr. Janos Schanda from University of Veszprem, Hungary
• *Dr. Peter Bodrogi, 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. Itala Kucsera from Coloryte, Hungary
• Ms. Monica Billger from Chalmers Univ. of Tech., Sweden
• Dr. Peyma Oskoui from HP Labs., USA
• Ms. Elizabeth Pirrotta, Consultant, USA
• Mr. Elie Khoury, Alwan Color Expertise, France
• Naoya Katoh from Sony Corporation, Japan - TC8-04 Chair

4.2 Progress since last report

TC8-04 had two physical meeting during the period. First one was at Warsaw, Poland during the 24th Session of the CIE, and second one was at Scottsdale, AZ, USA during IS&T/SID's Color Imaging Conference.

http://www.colour.org/tc8-04/Meetings/TC804meeting_0625.pdf
http://www.colour.org/tc8-04/Meetings/TC804_991116_rev2.pdf

Basically, experimental guideline to perform cross-examination at different laboratories.

• TC has decided to start their experiments with "softcopy/hardcopy comparison." And then compare the case with "softcopy under ambient light" and "hardcopy alone".
• S-LMS model (proposed by Katoh) and CIECAM97s2 with mixed adaptation will be tested. Worked calculation examples for both models are prepared as MS/Excel at;
  http://www.colour.org/tc8-04/Spread_sheets/S-LMS_rev2.xls and,
  http://www.colour.org/tc8-04/Spread_sheets/CIECAM97s2_wMixAdp.xls
• CIE/F11 will be used as default lighting. CIE/F10 will be used if F11 is not available.
  see http://www.colour.org/tc8-04/Data/F.txt
• Standard images will be provided by each company (if possible) and then 3 or 4 standard set will be chosen. Sony has provides three images at URL below, others are expected to come.
  see http://www.colour.org/tc8-04/test_images/Sony/
• Oskoui and Pirotta has performed experimets to see the effect of ambient light on the color appearance on the CRT screen (at fixed state of adaptation), and their results will be used as a background for this TC's work.
  P. Oskoui, E. Pirotta, "Influence of Background Characteristics on Adapted White Point" - Presentation Slides for CIC'98

4.3 Plans for next quarter

As stated above, guidelines were decided and members are about to start the experiments. TC chair expects members to have primary results by the end of next quarter. To do so, it is very important to have set of standard Test Images decided ASAP.