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Volume 24, Issue 2
Displaying 1-9 of 9 articles from this issue
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Masayoshi FUJITA1988 Volume 24 Issue 2 Pages 77-81
Published: April 15, 1988
Released on J-STAGE: March 11, 2010
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Hiroshi NAKANO1988 Volume 24 Issue 2 Pages 83-88
Published: April 15, 1988
Released on J-STAGE: March 11, 2010
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Nobuichi TADENUMA1988 Volume 24 Issue 2 Pages 89-92
Published: April 15, 1988
Released on J-STAGE: March 11, 2010
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Eitaro MASUYAMA1988 Volume 24 Issue 2 Pages 93-100
Published: April 15, 1988
Released on J-STAGE: March 11, 2010
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Gentarow OHMI1988 Volume 24 Issue 2 Pages 101-106
Published: April 15, 1988
Released on J-STAGE: March 11, 2010
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Asao KOMACHIYA1988 Volume 24 Issue 2 Pages 107-112
Published: April 15, 1988
Released on J-STAGE: March 11, 2010
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Yoshio NAKASHIMA1988 Volume 24 Issue 2 Pages 113-119
Published: April 15, 1988
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSApparent hue of the traffic light signals in the photopic and scotopic vision was investigated employing the color-naming method. Color-naming method of 10 grade evaluation was used. Five observers with normal color vision and visual acuity participated in this experiment. Apparent hue of the blue traffic light signals ranged from greenish-blue to yellowish-green in the chromaticity diagram, and considerable number of signals deviated from the recommendations of both CIE and traffic control institution in Japan. Hue shift of the traffic light signals in the scotopic vision was also compared to the photopic one. The results showed that blue and white components of the blue light signals increased to about 50% and 15% respectively in the scotopic vision. This suggests that apparent hue of the traffic light signals changes considerably according to the adaptation levels of car driver's visual system. Disadvantage for the blue light signals in Japan was also pointed out considering the characteristic of our color vision.View full abstractDownload PDF (791K) -
Yoshio NAKASHIMA1988 Volume 24 Issue 2 Pages 121-125
Published: April 15, 1988
Released on J-STAGE: March 11, 2010
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Asao KOMACHIYA1988 Volume 24 Issue 2 Pages 129-132
Published: April 15, 1988
Released on J-STAGE: March 11, 2010
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