Gesture recognition method and system based on depth camera and contour extraction

The invention belongs to the technical field of optical information processing, computer vision and the like, and particularly relates to a gesture recognition method and system based on a depth camera and contour extraction, and the method comprises the steps: obtaining gesture point cloud data; preprocessing the gesture point cloud data by using a gesture point cloud data processing algorithm; performing principal component analysis and contour extraction on the preprocessed gesture point cloud data to obtain compressed gesture point cloud data; the processed gesture point cloud data is divided into a plurality of data sets, the data sets are trained and tested through a gesture point cloud data recognition algorithm, a gesture recognition model is obtained through training, gesture point cloud data are input into the gesture recognition model, gesture category information is output, and a gesture recognition result is obtained through testing. The method greatly improves the processing speed of a gesture p