面向嵌入式平台的轻量化神经网络手势识别方法

Compared with the traditional gesture recognition algorithms based on image segmentation and feature extraction in complex backgrounds which have low recognition accuracy and poor flexibility, the gesture recognition algorithm based on target detection neural network can effectively improve the accuracy of gesture recognition in complex environments. Restricted by the size and power consumption of embedded processors, the recognition speed of commonly used target detection neural networks on embedded processors is low and cannot meet the requirements of real-time gesture recognition. In this paper, we optimize the SSD target detection and use MobileNetv3 network to achieve feature extraction and SSD-lite structure for target detection, thus to use depth-separable convolution instead of ordinary convolution to realize the design of lightweight MobileNetv3-SSDLite gesture recognition algorithm. For the requirements of gesture recognition, we make a dataset containing different gestures and complete the training of the model on the server using the dataset. In order to meet the arithmetic limitation of embedded processor, we quantize the float64 network parameters into int8 by quantization compression of the model, and compress the network structure to improve the inference speed of the network on embedded processor to realize the embedded-based gesture recognition. The experimental results show that the embedded-based MobileNetv3-SSDLite gesture recognition algorithm can achieve an average accuracy of 99.61% and a recognition speed of above 50 frame/s, which meets the requirements of real-time gesture recognition.