A new measurement method for color discrimination thresholds of human eyes based on PWM light-mixing technology

Jiyan Zhang; Jinxin Dong

doi:10.1117/12.2243271

27 September 2016 A new measurement method for color discrimination thresholds of human eyes based on PWM light-mixing technology

Jiyan Zhang, Jinxin Dong

Author Affiliations +

Proceedings Volume 9684, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment; 968435 (2016) https://doi.org/10.1117/12.2243271
Event: Eighth International Symposium on Advanced Optical Manufacturing and Testing Technology (AOMATT2016), 2016, Suzhou, China

Abstract

The color discrimination is a powerful tool for detection of eye diseases, and it is is necessary to produce different kinds of color rapidly and precisely for testing color discrimination thresholds of human eyes. Three channels’ pulse-width modulation (PWM) and light-mixing technology is a new way to mixing color, and a new measurement method for color discrimination thresholds of human eyes based on PWM light-mix technology can generate kinds of color stimuli. In this study, 5 youth volunteers were measured via this equipment after the test for the stability of the device’s illumination and chrominance. Though the theory of Macadam ellipses and the interleaved staircase method, a psychophysical experiment was made to study the color discrimination threshold of the human eyes around a basic color center. By analyzing the data of the chromatic ellipse and the color discrimination threshold, the result shows that each color is not uniform in a single color region and the color difference threshold of normal human is around the third Macadam ellipses. The experimental results show that the repeatability and accuracy of the observer can meet the accuracy requirements of the relevant experiments, and the data is reliable and effective, which means the measurement method is an effective way to measure the color discrimination thresholds of human visual system.

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Jiyan Zhang and Jinxin Dong "A new measurement method for color discrimination thresholds of human eyes based on PWM light-mixing technology", Proc. SPIE 9684, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment, 968435 (27 September 2016); https://doi.org/10.1117/12.2243271

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KEYWORDS

Color difference

Light emitting diodes

Eye

Visualization

Lamps

Color centers

CRTs

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