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Method for the measurement of chromatic contrast

机译：色差测量方法

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摘要

The contrast of simple achromatic periodic patterns such as square-wave gratings is well defined and agrees with the Michelson contrast, but this is not so for chromatic contrast. It would be desirable to be able to determine the contrast of two colors for use in a general legibility metric. A method for determining the contrast of chromatic square-wave gratings, which is based on the CIE 1976 color difference formula, is proposed. In order to prove the feasibility, we first investigated the contrast sensitivity function of an achromatic grating using Michelson contrast for comparison through sets of psychophysical experiments keeping the mean luminance constant at 22.54 cd/m2. Further experiments compared the curve of contrast sensitivity function for red, green, and red-green chromatic square-wave grating in terms of the proposed formula and conventional formula in LMS cone contrast space, which is frequently used in calculating the contrast of color gratings. The results revealed that proposed method is helpful in calculating the contrast of chromatic square-wave gratings and reveals important physical meaning in measuring the contrast of chromatic gratings
机译：简单的消色差周期性图案（例如方波光栅）的对比度定义得很好，并且与迈克尔逊对比度吻合，但是对于色差而言并非如此。期望能够确定用于一般清晰度度量的两种颜色的对比度。提出了一种基于CIE 1976色差公式的彩色方波光栅对比度确定方法。为了证明可行性，我们首先使用迈克尔逊对比度研究了消色差光栅的对比度敏感度函数，通过一系列心理物理实验进行比较，以保持平均亮度恒定在22.54 cd / m2。进一步的实验根据LMS锥形对比度空间中的拟议公式和常规公式，比较了红色，绿色和红绿色彩色方波光栅的对比度灵敏度函数曲线，该公式经常用于计算彩色光栅的对比度。结果表明，该方法有助于计算彩色方波光栅的对比度，并在测量彩色光栅的对比度时具有重要的物理意义。

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  • 来源
    《Optical engineering》 |2015年第3期|033107.1-033107.7|共7页
  • 作者

    Kai Lin; Ningfang Liao; Dazun Zhao; Hongsong Li;

  • 作者单位

    Beijing Institute of Technology, School of Optoelectronics, National Laboratory of Color Sciences and Engineering, No. 5, South Zhongguancun Street, Haidian District, Beijing 100081, China;

    Beijing Institute of Technology, School of Optoelectronics, National Laboratory of Color Sciences and Engineering, No. 5, South Zhongguancun Street, Haidian District, Beijing 100081, China;

    Beijing Institute of Technology, School of Optoelectronics, National Laboratory of Color Sciences and Engineering, No. 5, South Zhongguancun Street, Haidian District, Beijing 100081, China;

    Beijing Institute of Technology, School of Software, No. 5, South Zhongguancun Street, Haidian District, Beijing 100081, 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

    chromatic contrast; CIE 1976 L~*a~*b~* space; contrast sensitivity;

    机译：色差CIE 1976 L〜* a〜* b〜*空间;对比敏感度;

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