“…In the aspect of feature extraction, the researchers used the basic characteristics of the image, including color feature, texture feature and shape feature [3]. With the further research, more and more advanced features are applied to image recognition, including SIFT features, SURF features, multi scale sparse features and so on [4]; in the aspect of classification recognition, the early machine learning models have achieved good results, including K nearest neighbor, clustering, support vector machine, artificial neural network, naive Bayesian method and so on [5]. In recent years, with the deepening of research, more and more researchers use in-depth learning model for feature extraction and recognition, which has made great progress in image recognition.…”