MixCut:A Data Augmentation Method for Facial Expression Recognition
This addresses the issue of small datasets for researchers in facial expression recognition, but it is incremental as it builds on existing augmentation methods like CutOut, Mixup, and CutMix.
The paper tackles the problem of low accuracy in facial expression recognition due to limited training data by proposing MixCut, a data augmentation method that combines pixel-level interpolation and random square region removal, achieving 85.63% accuracy on Fer2013Plus and 87.88% on RAF-DB.
In the facial expression recognition task, researchers always get low accuracy of expression classification due to a small amount of training samples. In order to solve this kind of problem, we proposes a new data augmentation method named MixCut. In this method, we firstly interpolate the two original training samples at the pixel level in a random ratio to generate new samples. Then, pixel removal is performed in random square regions on the new samples to generate the final training samples. We evaluated the MixCut method on Fer2013Plus and RAF-DB. With MixCut, we achieved 85.63% accuracy in eight-label classification on Fer2013Plus and 87.88% accuracy in seven-label classification on RAF-DB, effectively improving the classification accuracy of facial expression image recognition. Meanwhile, on Fer2013Plus, MixCut achieved performance improvements of +0.59%, +0.36%, and +0.39% compared to the other three data augmentation methods: CutOut, Mixup, and CutMix, respectively. MixCut improves classification accuracy on RAF-DB by +0.22%, +0.65%, and +0.5% over these three data augmentation methods.