Journal of Sensor Science and Technology (센서학회지)
- Volume 7 Issue 6
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- Pages.409-417
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- 1998
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- 1225-5475(pISSN)
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- 2093-7563(eISSN)
Color Temperature Measurement and Classification of Ambient Light Sources Using two Color Sensors, Yellow and Cyan
옐로우와 사이안 두 광센서를 사용한 주위 조명광의 색온도 측정 및 분류
- Choi, Duk-Kyu (School of Electronic & Elec. Eng., Kyungpook National Univ.) ;
- Kwon, Yong-Dae (School of Electronic & Elec. Eng., Kyungpook National Univ.) ;
- Kwon, Ki-Ryong (Dept. of Elec. Eng., Pusan Univ. of Foreign Studies) ;
- Sohng, Kyu-Ik (School of Electronic & Elec. Eng., Kyungpook National Univ.)
- Published : 1998.11.30
Abstract
Originally, the reference white of the NTSC system used to be CIE illuminant C of 6774K. However, that of color television receiver has been adjusted to 9300K as a result of consumer preference for a very bluish white for monochrome television. Recent studies have revealed that the preferred color temperature of display white should be 3000K or 4000K higher than that of surround illuminant. Therefore it is required to classify ambient lighting source. In this paper, a efficient method that can distinguish the ambient incandescent lamp from fluorescent lamp under television viewing condition is developed using only two color sensors, yellow and cyan. Experimental results show that the proposed method is very useful for the discrimination of ambient lighting source, fluorescent of 6000K and incandescent lamp of 3000K. The system was also tested for mixture of these light sources.
NTSC 시스템 제정 당시의 기준백색은 6774K의 CIE C 광원을 사용하였다. 그후, 일반 소비자들이 흑백 텔레비전에 대하여 보다 푸른 백색을 선호하였기 때문에 칼러 텔레비전 수상기는 기준백색으로 9300K 근처로 조정되었다. 그러나 최근의 연구에 의하면 디스플레이 백색의 색온도는 주위 조명광보다
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