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伽玛值设置或校正是一种控制显示器显示颜色的简单实用方法。对条纹混色比色法视觉估计伽玛值的精度进行了研究,包括同一实验者的重复性、不同实验者的一致性、视觉估计与仪器测量结果的比较、混合条纹亮暗的选择对精度的影响。存hp CRT显示器上进行的实验结果表明,同一实验者有很高的重复性;不同实验者的差别较小;视觉估计红、绿、蓝和亮度通道的伽玛值的平均值分别是2.18、2.17、2.40、2.20,仪器测量得到的伽玛值的标准值分别是2.13、2.05、2.37、2.09。视觉估计和仪器测量的伽玛值差距约为0.08,适当选择亮、暗混合条纹不仅容易混合匹配,估计伽玛值与仪器测节结果更接近。
Gamma setting or correction is a simple and practical way to control the display color. The accuracy of visual gamma value estimation by streak colorimetric method was studied, including the repeatability of the same experimenter, the consistency of different experimenters, the comparison of the visual estimation and the measurement results of the instrument, the selection of the brightness and darkness of the mixed streaks, influences. The experimental results on the hp CRT display show that the same experimenter has high repeatability; the difference between different experimenters is small; the average of the gamma values of the red, green, blue and brightness channels visually estimated is 2.18, 2.17,2.40,2.20, the standard value of the gamma value measured by the instrument are 2.13,2.05,2.37,2.09. The difference between the visual estimation and the measured gamma value of the instrument is about 0.08. Appropriate choice of bright and dark hybrid stripes is not only easy to mix and match, it is estimated that the Gamma value is closer to the result of the instrument measurement.