CIE released a new technical report, CIE released 2017 color fidelity

Recently, CIE (International Lighting Commission) issued a technical report "the new CIE 224:2017 CIE 2017 Colour Fidelity Indexfor accurate scientific use", the main contents are sorted out to share with you.

As everyone knows, CIE color index (CRI), especially the general color rendering index Ra, widely used in the lighting industry, an important index for the evaluation of color light source is the international and domestic standards and specifications. However, in recent years, with the development of solid-state lighting, the defect of CRI gradually emerged, in many cases, Ra value and visual assessment can not be compared with the general observer matching, mainly manifested in two aspects: one is unable to accurately characterize the color fidelity; two is the lack of evaluation of perceptual color quality. So CIE decided to measure and regulate the white light source characterized by better methods of color quality, the work is divided into two parts, TC1-90 is responsible for the development of more scientific and accurate indicators of color fidelity, color fidelity and other indicators of color perception related by TC1-91.

This technical report CIE 224 is the results of TC1-90, put forward CIE 2017 color fidelity, namely color fidelity index (general colour fidelity index, Rf). The definition of Fidelity Index index IESNA TM-30-15 based on inaccurate problems corrected CRI as the color fidelity index exists.

Rf said all the swatches in was light and the reference light color appearance close to the average level, similar to the general color rendering index of Ra, but it only considers a color quality, and does not take into account the visual perception / preference etc.. At this stage, Rf can not replace CRI, CRI substitution is to study and discuss the topic, in addition to Rf, will develop a series of new quality metrics related to color perception.

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