Description

This Symposium was the third in a series of meetings of colour experts to discuss colour standards for imaging technology and the second to be organized by the CIE. It was a follow-up to the very successful Symposium on the same topic held in Vienna, Austria in 1996. The purpose was again to inform users of imaging technology on new standard methods and to provide international standard-writing organisations with the necessary feedback from the community of imaging technologies on their requirements and needs. The Symposium began with a joint session with the IS&T;/SID Fifth Color Imaging Conference and ended with a discussion in which conclusions and action plans were formulated.The goals of the Symposium were:

• to share information on the technical content and status of projects involving the characterisation or definition of the colour of images, 
• to review progress on various issues identified as priorities during the 1996 Symposium,
• to identify areas requiring new technology or knowledge and to recommend needed activities of CIE, industry and other standards groups to provide the necessary solutions.

We began with a Session in which members of various CIE Technical Committees preparing standards for colour in imaging technology reported on progress and issues in their work. There were also reports from other organisations working in this field. Following this first Session, there were four separate, non-overlapping Sessions which dealt with the following sub-topics:

• Metrology of displays
• Viewing conditions
• RGB colour space
• Colour appearance models (in this Session the CIE 1997 Interim Colour Appearance Model (Simple Version), CIECAM97s, and the underlying scientific research were introduced).

Ample time was included for open discussion. The final Session was an open Session (general discussion and formulatation of some action plans for the future). The Proceedings contain on 140 pages the text of the papers read as well as reports on the roundtable discussions.

Description

Currently there is considerable effort within the LED industry and the community who use LEDs to standardise on LED characterisation and measurement. CIE TC 2-34 LED Measurements completed its report on the subject (published as CIE 127-1997 Measurement of LEDs). The CIE 1997 Workshop and Symposium, held on 22-25 October 1997 at the CIE Central Bureau, Vienna, Austria, introduced the CIE recommendations on LED measurements and dealt with the underlying radiometric, photometric and colorimetric measurements. Health aspects of LED radiation were also discussed. The goals of the meeting were:

to introduce the recommended CIE method for characterising LEDs, to share information on the technical content and status of projects involving the characterisation of LEDs, to identify areas where existing/proposed industrial methods are divergent and to initiate discussion towards resolution, to identify areas requiring new technology or knowledge and to recommend needed activities of CIE and industry to provide the necessary solutions.

Papers were read on the following subjects:

• * New LED technologies
• * Industrial measurements
• * Safety issues of LEDs and other light sources, eye hazards
• LED lighting products, the use of LEDs in modern lighting applications
• Measuring new LED products, laboratory and industrial measurements
• LED measuring devices.

The Proceedings contain the text of the 12 papers read as well as a report on the roundtable discussions. The Publication consist of 85 pages.