不同照明条件下FM-100色相棋实验颜色辨别力量化有效性验证

Farnsworth-Munsell 100(FM-100)色相棋实验是测试人眼视觉辨色力的经典方法,其通过在CIE标准照明体C条件下颜色均匀分布的色相棋样本排布及对应分析,实现观察者视觉辨色力的量化。然而,由于色相棋样本颜色分布均匀性受照明光源的影响,有关其它光源条件下色相棋实验的有效性尚待论证。为解决此问题,本研究分别在3000 K色温,200 lx照度的6组光源照明条件以及5500 K色温、500 lx照度的5组光源照明条件下,对24名色觉正常观察者进行FM-100色相棋实验。结果显示:照明条件为5500 K、500 lx时观察者的颜色辨别力远好于3000 K、200 lx条件;同一观察者在不同照明条件实验中所表现的颜色辨别能力差异具有一定的稳定性;不同照明条件下FM-100色相棋相邻样本色相角差分布情况较为一致。以上说明不同照明条件下利用FM-100色相棋实验表征颜色辨别力的方法具有合理有效性。

Verification of Farnworth-Munsell 100 Hue Test on Color Discrimination Quantification under Different Lighting Conditions

The Farnsworth-Munsell 100(FM-100)hue test is a classic method for testing human visual color discrimination ability.It realizes the quantification of observers’color discrimination by asking them to sort the color samples with uniform color distribution under the lighting condition of CIE standard illuminant C and analyzing the results correspondingly.However,since the color distribution of the samples is affected by the spectral power distribution of light sources,the effectiveness of FM-100 hue test under other lighting conditions remains to be demonstrated.In order to solve this problem,two sets of the FM-100 hue test were performed with 24 observers with normal color vision under different lighting conditions:one set of the lighting conditions is 6 kinds of light sources with 3000 K correlated color temperature,200 lx illumination and the other is 5 kinds of light sources with 5500 K correlated color temperature and 500 lx illumination.The results show that:①as for the lighting condition of 5500 K,500 lx,the observers’color discrimination is much better than that of 3000 K,200 lx;②there is a certain stability in the color discrimination of the same observer under different lighting conditions;③under different lighting conditions,the difference of hue angle between adjacent FM-100 color samples is consistent.As explained above,the method of characterizing color discrimination using FM-100 hue test under different lighting conditions is reasonable and effective.