马丁内斯教授补充道：“参与者可以清楚地识别出哪些照片的脸色很和谐，哪些照片脸色不和谐。”

"People have always said that we use makeup to look beautiful or younger, but I think that it is possible that we actually do it to appear happier or create a positive perception of emotion--or a negative perception, if you wanted to do that.”

“人们总是说我们用化妆品来使自己看起来更美丽或更年轻，但我认为我们实际上也可以通过化妆来让自己看起来更快乐或营造出积极的面貌，或是消极的面貌，如果你愿意的话。”

It also enabled researchers to construct computer algorithms that correctly recognize human emotion via face color up to 90 percent of the time.

依据这一原理，科学家还构建出能够通过脸色准确识别人类情绪的计算机算法，准确率达90%。

Happiness was the easiest emotion for the computer to recognize by color alone, and it detected the emotion with 90 percent accuracy. Anger was detectable by color alone 80 percent of the time, and sadness 75 percent of the time. Fear was recognizable 70 percent of the time.

快乐是单看脸色的情况下最容易能被计算机识别出的情绪，准确率高达90%。单看脸色识别生气的准确率为80%，悲伤则是75%。单看脸色识别恐惧的准确率为70%。

The study was published in the Proceedings of the National Academy of Sciences.

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