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科学美国人60秒: 你必须用眼睛微笑

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Computer Tells Real Smiles from Phonies

电脑能分辨出假笑

Is that person really glad to see me? Or are they just being polite? Some people struggle to distinguish a perfunctory grin from a truly happy smile. And computers have found this task even more difficult—that is, until researchers trained a program to detect when a smile is genuine.

他见到我真的高兴吗?还是只是出于礼貌?有些人很难区分敷衍的微笑和真正快乐的微笑。而计算机对此进行区分更加困难——也就是说,研究人员需要研发出一个程序来检测一个微笑何时是发自内心的。

Visual computing researchers at the University of Bradford in the U.K. started with software for analyzing a changing facial expression. This program can examine a video clip of a human head and identify specific details around the eyes, cheeks and mouth. Then the program tracks the details moving relative to each other as the face smiles.

英国布拉德福德大学的视觉计算研究人员从分析面部表情变化的软件开始。这个程序可以检查人类头部的视频剪辑,识别眼睛、脸颊和嘴巴周围的特定细节。然后,当人脸微笑时,程序就会追踪彼此之间相对移动的细节。

Next, the scientists had their program evaluate two sets of video clips. In one, subjects performed posed smiles. In the other, they watched a film that inspired genuine displays of emotion. The program calculated the differences among the subjects’ faces during the two clips. And it turns out that your mouth, cheeks and eyes move differently when you’re faking that smirk.

接下来,科学家让他们的程序评估两组视频剪辑。在其中一个实验中,受试者摆出假笑的姿势。在另一个实验中,他们观看了一部激发真实情感的电影。该程序计算了两段视频中受试者面部表情的差异。事实证明,假笑时,你的嘴、脸颊和眼睛的运动方式与发自内心的笑是不同的。

In particular, the muscles around the eyes shift 10 percent more for a real smile than they do for a fake one. These results are in the journal Advanced Engineering Informatics.

特别是,眼睛周围的肌肉在真实微笑时比在虚假微笑时多移动10%。研究结果发表在《高级工程信息学》杂志上。

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The researchers suggest their work could improve a computer’s ability to analyze facial expressions and thus to interact more smoothly with humans. But their real accomplishment is in proving Tyra Banks right: “You have to smile with your eyes.”

研究人员表示,他们的工作可以提高计算机分析面部表情的能力,从而更顺畅地与人类互动。但他们真正的成就是证明泰拉班克斯是对的:“你必须用眼睛微笑。”

Computer Tells Real Smiles from Phonies

Is that person really glad to see me? Or are they just being polite? Some people struggle to distinguish a perfunctory grin from a truly happy smile. And computers have found this task even more difficult—that is, until researchers trained a program to detect when a smile is genuine.

Visual computing researchers at the University of Bradford in the U.K. started with software for analyzing a changing facial expression. This program can examine a video clip of a human head and identify specific details around the eyes, cheeks and mouth. Then the program tracks the details moving relative to each other as the face smiles.

Next, the scientists had their program evaluate two sets of video clips. In one, subjects performed posed smiles. In the other, they watched a film that inspired genuine displays of emotion. The program calculated the differences among the subjects’ faces during the two clips. And it turns out that your mouth, cheeks and eyes move differently when you’re faking that smirk.

In particular, the muscles around the eyes shift 10 percent more for a real smile than they do for a fake one. These results are in the journal Advanced Engineering Informatics.

The researchers suggest their work could improve a computer’s ability to analyze facial expressions and thus to interact more smoothly with humans. But their real accomplishment is in proving Tyra Banks right: “You have to smile with your eyes.”


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