Fingerprint classification is a significant guarantee for efficient and accurate fingerprint recognition, especially when dealing with one-to-many fingerprint recognition. However, due to large intra-class variability, small inter-class variability, and noise, existing fingerprint classification algorithms still require further improvement in performance and efficiency. In this paper, a Lightweight CNN (Convolutional Neural Network) structure based on singularity ROI (region of interest) is proposed. The experimental results show that the accuracy on testing set of the proposed structure achieves 93%, which is far better than classic non-NN (neural network) classifiers, including RF(Random Forest), KNN (K-Nearest-Neighbor), LR (Logistic Regression), Linear SVM (Support Vector Machine), and RBF (Radial Basis Function) SVM. More momentously, compared with other three CNN structures published in recent years, the proposed structure achieves similar or even better performance with 1/12 to 1/38 parameter scale of other structures, which helps to proceed faster training and testing. Moreover, the proposed CNN model with fewer neurons can achieve better suppression of overfitting and robustness to noise.

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It is necessary to complete the two parts of gesture recognition and wireless remote control to realize the gesture control of the automatic pruning machine. To realize gesture recognition, in this paper, we have carried out the research of gesture recognition technology based on surface electromyography signal, and discussed the influence of different numbers and different gesture combinations on the optimal size. We have calculated the 630-dimensional eigenvector from the benchmark scientific database of sEMG signals and extracted the features using principal component analysis (PCA). Discriminant analysis (DA) has been used to compare the processing effects of each feature extraction method. The experimental results have shown that the recognition rate of four gestures can reach 100.0%, the recognition rate of six gestures can reach 98.29%, and the optimal size is 516~523 dimensions. This study lays a foundation for the follow-up work of the pruning machine gesture control, and p rovides a compelling new way to promote the creative and human computer interaction process of forestry machinery.