Toward Recognition of Easily Confused TCM Herbs on the Smartphone Using Hierarchical Clustering Convolutional Neural Network

Table 9

The result of using different data augmentation (DA) methods.

	iPhone (%)	Xiaomi (%)	Samsung (%)	Asus (%)	Avg. (%)
Without DA	92.60	82.81	90.10	81.77	86.82
(1) Rotation	92.81	84.48	88.13	84.27	87.42
(2) Size	94.58	86.25	89.17	84.79	88.70
(3) Brightness	91.88	87.92	90.31	89.17	89.82
(4) Histogram equalization	89.69	83.23	89.06	83.75	86.43

Data augmentation through histogram equalization might reduce the recognition accuracy for iPhone and Samsung S7.