The original version of this article unfortunately contained a mistake. Graphs c, d and e are missing in Figure 4. The correct and complete graphs of Figure 4 is shown here.

中文翻译：

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校正至：面部表情识别，感测测试样本的复杂性

不幸的是，本文的原始版本包含一个错误。图4中缺少图c，d和e。此处显示了图4的正确和完整图。