[Retracted] Deep Learning and Improved HMM Training Algorithm and Its Analysis in Facial Expression Recognition of Sports Athletes

Table 1

Facial expression data set.

Data set	CelebA	VGG face	IJB-A
Number of people	12356	2532	24610
Number of pictures	300000	2600000	52163
Data set properties	It contains 5 feature points and 40 personal face attributes	Face area and identity tag	Face area and identity tag