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首页> 外文期刊>Optical engineering >Enhancing local color contrast by optimizing multichannel LED light sources
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Enhancing local color contrast by optimizing multichannel LED light sources

机译：通过优化多通道LED光源增强局部色彩对比度

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摘要

Color perception of an object is tremendously influenced by the spectral power distribution (SPD) of a light source. Therefore, it is of great significance to seek for an optimal SPD to enhance the color contrast of a biological specimen in medical lighting. Meanwhile, considering that color rendering property and illuminance are of importance to lighting, with a multichannel LED light source and a differential evolution algorithm dealing with the constraints of color rendering and illuminance, a contrast enhancement method based on maximizing CIEDE2000 color difference (∆E_(00)~*) was proposed in this study. An illuminance level of 500 Ix was first verified as the desired illuminance. Afterward, the color contrasts of six groups of color patches were optimized under four different constraints of the Commission Internationale de I'Eclairage (CIE) general color rendering index (R_a), i.e., R_a ≥0,R_a≥ 60, R_a ≥ 80, and R_a ≥ 90, manifesting their significant color contrast enhancement under the optimized light sources compared with those under the simulated CIE A, D50, D65, and D75 light sources. Further, two biological samples, pork tissues and porcine heart, were optimized under the four constraints of R_a. The results show that even in the case of R_a ≥ 90, the optimized (∆E_(00)~*) values for the two specimens are, respectively, 4.13 and 3.20 higher than those under the D75 light source. More importantly, the developed method also provides a flexible lighting solution to color contrast enhancement.
机译：物体的色彩感知受光源的光谱功率分布（SPD）极大地影响。因此，寻求最佳的SPD以增强医疗照明中生物标本的色彩对比度具有重要意义。同时，考虑到显色性和照度对于照明非常重要，因此采用多通道LED光源和差分演化算法来应对显色和照度的约束，这是一种基于最大化CIEDE2000色差（ΔE_（ 00）〜*）是在这项研究中提出的。首先将500 Ix的照度水平验证为所需照度。此后，在国际照明委员会（CIE）通用显色指数（R_a）的四个不同限制下，优化了六组色块的色彩对比度，即R_a≥0，R_a≥60，R_a≥80，和R_a≥90，与在模拟的CIE A，D50，D65和D75光源下相比，在优化的光源下具有明显的色彩对比度增强。此外，在R_a的四个约束条件下优化了两个生物学样品，即猪肉组织和猪心脏。结果表明，即使在R_a≥90的情况下，两个样本的最佳（∆E_（00）〜*）最佳值也分别比D75光源下的最佳值高4.13和3.20。更重要的是，所开发的方法还提供了一种灵活的照明解决方案来增强色彩对比度。

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  • 来源
    《Optical engineering》 |2018年第7期|074111.1-074111.9|共9页
  • 作者

    Jian Yang; Haisong Xu; Fuzheng Zhang; Zhehong Wang; Peng Xu;

  • 作者单位

    Zhejiang University, College of Optical Science and Engineering, State Key Laboratory of Modern Optical Instrumentation, Hangzhou, China;

    Zhejiang University, College of Optical Science and Engineering, State Key Laboratory of Modern Optical Instrumentation, Hangzhou, China;

    Zhejiang University, College of Optical Science and Engineering, State Key Laboratory of Modern Optical Instrumentation, Hangzhou, China;

    Hangzhou Institute of Test and Calibration for Quality and Technology Supervision, Hangzhou, China;

    Zhejiang University, College of Optical Science and Engineering, State Key Laboratory of Modern Optical Instrumentation, Hangzhou, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    medical lighting; color contrast enhancement; optimal spectral power distribution; differential evolution; multichannel LEDs;

    机译：医疗照明;颜色对比度增强;最佳频谱功率分布;差异进化多通道LED;

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