Method for recognizing frightening expression based on intelligent image splicing and machine learning

The invention discloses a method for recognizing frightening expressions based on intelligent image splicing and machine learning. The method comprises the following steps: 1, searching a frighteningexpression related picture in a fer2013 expression picture set or the Internet; manually classifying and adding a label, marking 68 most important feature points of a human face by utilizing a dlib library in python3, extracting coordinate features and then reducing dimensions, importing data into a machine learning model of a naive Bayesian algorithm in sciki-learn, and establishing a database; carrying out matching and matrix transformation on face pictures shot by different cameras by using openCV through an SIFT feature extraction method, removing the overlapped part and intelligently performing fusing to form a complete face picture; extracting coordinate positions of feature points in the complete face picture obtained in the previous step, performing dimensionality reduction to extract effective data, subst