Category Archives: CIE

CIE 223:2017

Multispectral Image Formats

Published by: 2017-02-01 / 2017-02-01 / 70 pages
This technical report describes the basic model of multispectral imaging technology followed by the requirements and the examples of multispectral image formats suitable for colour imaging applications. Four example formats are introduced and compared in typical use cases: JPEG 2000, Spectral Binary File Format, Natural Vision, and multispectral image file format AIX. The specifications of those formats except for JPEG 2000 are provided in the Annex.

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CIE x043:2016

Proceedings of the 4th CIE Expert Symposium on Colour and Visual Appearance

Published by: 2016-09-07 / 2016-09-07 / 510 pages
Visual assessment of the appearance of objects and materials involves aspects such as:

• the object itself and its optical characteristics;

• the position, size, shape and spectrum of the light source;

• the nature of the visual field surrounding the object;

• the observer’s visual system with its amazing complexity.

Research areas have been formed which are devoted to the four visual attributes: colour, gloss, texture and translucency. The development of new visual appearance effects, such as goniochromatism and graininess, have required progress and evolution in the quantification of visual appearance and corresponding measurement setups. The outcome of research in this area is significant for industrial sectors where the measurement of visual appearance is important and for manufacturers of measurement equipment.
During this joint symposium of CIE Divisions 1 and 2 presentations were given on:

• the state of the art in our understanding of the perception of the visual attributes, such as colour, texture, translucency and gloss;

• the latest achievements in the fields of novel measurement methodologies such as BRDF, BTDF, BSSRDF and others;

• possible applications of visual appearance knowledge and novel measurement methodologies for the design and characterization of modern optical surfaces.

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CIE 220:2016

Characterization and Calibration Methods of UV Radiometers

Published by: 2016-09-01 / 2016-09-01 / 54 pages
This technical document prepared by CIE Technical Committee TC 2-47 describes quality indices for UV radiometers, which are helpful for manufacturers and users to characterize instruments on a common basis. To harmonize CIE documents, the quality indices described in this document relate to the quality indices described in Joint ISO/CIE International Standard ISO/CIE 19476:2014(E) (formerly CIE S 023/E:2013), and references are made to those where applicable.

Different from photometers, the subject of ISO/CIE 19476:2014(E), UV radiometers may be designed for various actinic spectra and different spectral ranges. Therefore, instead of only one defined reference-spectrum source (CIE Source A) used in ISO/CIE 19476:2014(E) three reference-spectrum sources are proposed in this document to support the generic spectral characterization of UV radiometers for various applications. The defined spectra of reference sources for the characterization of UV radiometers are given in Annex A.

This document also describes source-based and detector-based methods along with measurement conditions and limiting boundary conditions for the calibration of UV radiometers used for laboratory as well as industrial applications.

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CIE DIS 025/E:2014

Test Method for LED Lamps, LED Luminaires and LED Modules

Published by: Commission Internationale de L’Eclairage / 2014-09-01 / 58 pages
This standard provides requirements to perform reproducible photometric and colorimetric measurements on LED lamps, LED modules, and LED luminaires (LED devices). It also provides advice for the reporting of the data. The availability of reliable and accurate photometric data for LED devices is a basic requirement for designing good lighting systems and evaluating performance of products. By obtaining these data through measurements in specific normalized measuring conditions, the consistency of the data should be ensured between different laboratories (within the limits of the declared measurement uncertainty) and comparison of different products on the same basis is possible.

The standard specifies the requirements for measurement of electrical, photometric, and colorimetric quantities of LED lamps, LED modules and LED luminaires, for operation with AC or DC supply voltages, possibly with associated LED control gear. LED light engines are assimilated to LED modules and handled accordingly. Photometric and colorimetric quantities covered in this standard include total luminous flux, luminous efficacy, partial luminous flux, luminous intensity distribution, centre-beam intensity, luminance and luminance distribution, chromaticity coordinates, correlated colour temperature (CCT), colour rendering index (CRI), and angular colour uniformity. This standard does not cover LED packages and products based on OLEDs (organic LEDs).

The standard aims in particular to cover measurement methods for testing the compliance of LED devices with the photometric and colorimetric requirements of LED performance standards issued by IEC TC 34 “Lamps and related equipment”.

As LED devices offer a large variety of configurations in respect to geometry and/or colour, the photometric and colorimetric performances are considered individually for each configuration.

The Draft International Standard has been sent to CIE National Committees for comments and sales to interested parties. It is still subject to changes and may not yet be referred to as a CIE International Standard. When approved by the CIE NCs, it will be published as a CIE International Standard.

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CIE 211:2014

Colour Appearance in Peripheral Vision

Published by: Commission Internationale de L’Eclairage / 2014-06-01 / 24 pages
This report describes colour zone maps, which are the contour maps showing unique hue components for the red, dark yellow, yellow, green and blue stimuli, over the entire visual expanse based on experimental results using hue and saturation judgements. Characteristics of colour-appearance change in the entire visual expanse show basically the same tendency as those in previous studies using a similar method. Estimation of a unique hue component in a peripheral position utilizing the colour zone map is described with an example.

The publication is written in English, with a short summary in French and German. It consists of 22 pages with 7 figures and 1 table.

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CIE 210:2014

Photometry Using V(l)-Corrected Detectors as Reference and Transfer Standards

Published by: Commission Internationale de L’Eclairage / 2014-05-01 / 36 pages
This publication provides recommendations of the CIE concerning the use of V(λ)-corrected detectors as reference and transfer standards for photometric units. Specifically it includes the construction, characterization and directions for use of standard photometers for such purposes.

The publication is written in English, with a short summary in French and German. It consists of 34 pages with 11 figures.

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CIE 209:2014

Rationalizing Nomenclature for UV Doses and Effects on Humans

Published by: Commission Internationale de L’Eclairage / 2014-04-17
The field of atmospheric ultraviolet radiation (UV) research is plagued with difficulties in nomenclature. The problems arise from (a) the strong wavelength dependence of UV radiation received at the Earth’s surface, (b) the ad-hoc way disparate groups have approached the subject and (c) the incorrect use of units when action spectra for different UV effects are incorporated. This report highlights some of the issues, taking vitamin-D synthesis, a beneficial effect, as a specific example. Standard vitamin-D dose (SDD) and minimum vitamin-D dose (MDD) are proposed, analogous to the standard erythema dose (SED) and minimum erythema dose (MED) that are in common use for erythema. In recognition of the fact that currently accepted action spectra may be revised in future if new data become available, it is recommended that spectrally resolved irradiance measurements are maintained and continued so that biologically effective irradiances and doses may be reprocessed.

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CIE x039:2014

Proceedings of CIE 2014 Lighting Quality and Energy Efficiency

Published by: Commission Internationale de L’Eclairage / 2014-06-01 / 983 pages
In April 2014 the Lighting Quality & Energy Efficiency Conference took place in Kuala Lumpur, Malaysia. The event gave academics, lighting industry professionals, designers, researchers and representatives of regulatory authorities the opportunity to discuss best practice and the latest developments in the field of light and illumination. Recommendations were also made for reducing the amount of energy used for lighting. One of the hottest topics at the conference was light emitting diodes (LEDs), which offer significant environmental and energy-efficiency benefits compared with conventional lamps.

The Proceedings of this Conference include invited papers and papers of the oral and poster presentations.

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CIE S 023/E:2013

Characterization of the Performance of Illuminance Meters and Luminance Meters

Published by: Commission Internationale de L’Eclairage / 05/01/2013 / 45 pages
This CIE International Standard defines quality indices characterizing the performance
of illuminance and luminance meters in a general lighting measurement situation, as
well as measurement procedures for the individual indices and standard calibration
Measurements of illuminance or luminance and their accuracy are influenced by
various parameters, such as operational conditions, properties of light sources, as
well as characteristics of the applied photometers. The characteristics of these
photometers alone do not allow the determination of the measurement uncertainty for
a specific measurement task. Nevertheless, it is generally true that instruments with
“better” characteristics in most cases produce smaller uncertainties than instruments
with “worse” properties. This Standard has been written to:

  • give clear and unambiguous definitions for the individual quality indices;
  • define measurement procedures and methods for numerical evaluation of these
    quality indices;
  • define calibration conditions for illuminance meters and luminance meters.

Where different, the definitions of the quality indices and the associated measurement
procedures and methods for numerical evaluation given in this Standard supersede
those given in CIE Publication 53-1982. CIE publication 69-1987 shall be superseded
by this Standard.

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CIE x038:2013

Proceedings of CIE Centenary Conference "Towards a New Century of Light" Paris, France, 15-16 April 2013, Includes Addendum 1

Published by: Commission Internationale de L’Eclairage / 06/01/2013 / 1288 pages
In April 2013 CIE celebrated its 100th birthday in the course of its Midterm Meeting in
Paris, France. The meeting was accompanied by a 2-days conference on the subject
“Towards a New Century of Light”. In 2 keynote speeches, 60 oral presentations and
134 posters experts from all over the world presented latest research results and
survey lectures on various subjects related to light and lighting, e.g. “History of
Lighting and Art”, “Hot Topics in Outdoor Lighting”, “Colour Quality Assessment”,
“Health and Wellbeing”, “Workplace Lighting Concepts”, “Hot Topics in Interior
Lighting”, “Advanced Correction Methods for Spectroradiometry”, “Lighting the City ”
Applications and Economics”, “Integrating Daylight and Electric Lighting”, “LED
Photometry and Performance of Photometers”, “Lighting the City – Luminaires and
Design”, “Concepts in Lighting Quality”, “Brightness and Colour, Individual or Shared
Percepts”, “Lighting the City – Spaces”, “Wellbeing, Glare and Comfort”.

The Proceedings of this Conference consist of 1288 pages including 176 papers of
oral and poster presentations with some 1200 figures and some 300 tables.

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