Conference and Symposia Proceedings

CIE x050-PP023

CIE x050-PP023

EVALUATION OF THE COLOUR HARMONY OF ARTIFICIAL LIGHT AT NIGHT IN URBAN COMMERCIAL DISTRICT UTILIZING HYPERSPECTRAL IMAGING

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Secure PDF English € 35.00 EUR Immediate Download
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上列價格為CIE國際定價,向CIE-Taiwan訂購可享折扣優惠,CIE-Taiwan會員更享有會員優惠價,歡迎來電03-5732376或e-mail : cie_taiwan@itri.org.tw 洽詢。

 

Full Description

ALAN (artificial light at night) has changed the spectral composition of the night sky, disrupting the rhythms of natural ecosystems. In particular, the multicolour and high brightness of the nightscapes make the urban night present a chaotic and colourful scene. We therefore introduce the colour harmony theory for evaluating multiccolour lighting scenes. In this study, we collected hyperspectral data from 50 lighting scenarios in seven commercial districts in Shanghai. Utilizing the acquired hyperspectral data, we analyzed the luminance, chromaticity distribution, and colour harmony values of these districts. It was observed that modern architectural commercial districts (such as Lujiazui) exhibited a greater variety of colours compared to historical architectural districts (such as the Bund International Architecture Exhibition). This disparity can be attributed to the utilization of self-illuminating lighting methods in modern architecture, allowing for a broader range of colours, higher luminance levels, and increased colour harmony values. In contrast, historical buildings typically rely on floodlights for illumination, resulting in fewer colour options, lower luminance levels, and diminished colour harmony values.

 

Product Details

Published: 12/29/2023

Number of Pages: 10

File Size: 1 file , 1.1 MB

Note: This product is unavailable in Ukraine, Russia, Belarus

CIE x050-PP011

CIE x050-PP011

IMPROVEMENTS TO CIECAM16 AND FUTURE DIRECTIONS

FormatLanguagePriceAvaliablity
Secure PDF English € 35.00 EUR Immediate Download
Printed Edition English € 35.00 EUR Ships in 1-2 business days
Printed Edition + PDF English € 46.00 EUR Immediate Download

上列價格為CIE國際定價,向CIE-Taiwan訂購可享折扣優惠,CIE-Taiwan會員更享有會員優惠價,歡迎來電03-5732376或e-mail : cie_taiwan@itri.org.tw 洽詢。

 

Full Description

This paper provides an overview of active areas of research into CIECAM16, the CIE colour appearance model. Recent research suggests that the degree of chromatic adaptation as calculated by the model should depend on the colour of the adapting illumination. Additional alterations to the current von Kries model of chromatic adaptation would allow for different reference white points and path of partial adaptation. Novel to this paper is an analysis of potential structural faults in how CIECAM16 accounts for the adapting luminance and the overall scene luminance. There are also potential weaknesses in the formulas for perceptual attributes, such as brightness, lightness, colourfulness, and chroma, and recently published revisions to these formulas are presented. Finally, we discuss the contribution of chromatic intensity to our perception of brightness (the Helmholtz-Kohlrausch effect) and how a model of this effect might be incorporated into CIECAM16.

 

Product Details

Published: 12/29/2023

Number of Pages: 10

File Size: 1 file , 1000 KB

Note: This product is unavailable in Ukraine, Russia, Belarus