Fingerspelling Identification for Chinese Sign Language via AlexNet-Based Transfer Learning and Adam Optimizer

Table 7

Effect of data augmentation.

Run	Not using DA	Using DA 61x	Using DA 121x	Using DA 181x	Using DA 241x
1	85.19	87.78	88.15	91.48	90.37
2	85.19	85.19	89.63	89.26	89.26
3	85.93	86.30	87.78	89.26	88.89
4	82.22	86.30	85.93	87.78	89.63
5	82.59	87.41	87.41	89.26	89.63
6	84.44	86.67	88.89	90.00	89.63
7	85.56	87.04	88.89	89.26	88.52
8	83.70	85.56	90.00	87.78	88.52
9	84.07	88.15	88.52	90.00	87.78
10	83.70	87.04	88.52	90.74	90.00
Mean + SD	84.26 ± 1.24	86.74 ± 0.94	88.37 ± 1.16	89.48 ± 1.16	89.22 ± 0.79