This paper develops the threshold brightness contrast experiments of human eyes, and determines the important factor K in the visibility calculation models.

本文通过进行人眼阈限亮度对比实验，确定了可见度计算模型中的重要系数K。

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By using automation controlling of compensated Kappa factor principle and compensated brightness principle, the bleaching pulp can get high quality and the lowest consumption.

采用补偿卡伯因子、补偿白度控制原理，进行自动化操作控制稳定生产过程，使漂白浆质量稳定、消耗达到最低。

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"This object was changing its brightness by a factor of three or four -- it was just enormously variable, " Tholen said.

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The cam also has a focal length extension factor of 1.33, which helps to mitigate the problem of "vignetting, " or a fall-off in brightness that would occur without the extension factor.

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