摘要
为了研究CIELAB颜色空间中明度、彩度和色调等视觉容差与色调角之间的相关性对基于CIELAB的典型色差公式(CIELAB、CMC、BFD、CIE94、LCD以及CIEDE2000)预测性能的影响,实验选取了具有不同明度和彩度水平的5个色调环(L=30,50,70和Cab*=10,20,30),并采用3个不同视觉尺度(△V=3.02,5.92和8.87CIELAB单位)进行视觉评估实验。8名色觉正常观察者根据心理物理学的恒常刺激法原理,在阴极射线管(CRT)显示器上获取了相应颜色中心的明度、彩度和色调视觉容差。对实验结果的详细分析表明,由于明度容差与色调角无明显相关性,6个色差公式的预测性能均较好,其中CIEDE2000略优于其它色差公式。对于彩度容差,LCD(Leeds Color-difference formula)预测性能表现最优,而CIEDE2000和BFD的表现最差,其余色差公式则相差不多。CIEDE2000和LCD的色调权重函数的预测性能明显优于其它色差公式,而CMC预测性能则为最差。
In order to investigate the dependence of lightness, chroma, and hue visual tolerances upon hue angles in CIELAB color space, five hue circles were selected at different lightness and chroma levels （L＊=30,50,70 and C＊ab=10,20,30）, which were observed using three visual scales （AV=3.02,5.92和11 8.87 CIELAB units）. The test stimuli were presented on the CRT, and the corresponding lightness, chroma, and hue tolerances were measured by a panel of 8 color-normal observers by using the psychophysical method of constant stimuli. Based on the obtained correlation between visual tolerances and hue angles, the prediction performances of the six CIELAB-based colordifference formulae, CIELAB, CMC, BFD, CIE94, LCD, and CIEDE2000, were further evaluated. The detailed analysis indicated that due to the independence between the lightness tolerances and the hue angles, all the formulae performs well, with CIEDE2000 a little better than the others. For chroma tolerances, LCD performs the best, while CIEDE2000 and BFD the poorest, and the others performs nearly the same. The hue weighting functions of CIEDE2000 and LCD outperforms others obviously, with CMC performing poorest.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2009年第7期1838-1841,共4页
Acta Optica Sinica
基金
国家自然科学基金(60578011)资助项目
关键词
视觉光学
视觉与色彩
恒常刺激法
视觉容差
色差公式
权重函数
visual optics
vision and color
method of constant stimuli
visual tolerances
color-difference formulae
weighting functions
