Face image recognition system and method based on nine-grid principle

The invention provides a face image recognition system and a face image recognition method based on a nine-grid principle. The face image recognition method is characterized in that: firstly, the faceimage recognition system performs machine learning on a human face image set in a known library, wherein each human face image is sequentially subjected to gray scale conversion, normalization, imagegrid division, calculation of pixel feature values of each grid and embedment of feature values of each grid into one-dimensional nine-grid vector, and lightweight storage in mobile equipment is realized. During operation, the mobile equipment performs real-time frame taking through a video collected by a camera, the frame of picture is rapidly converted into a one-dimensional nine-grid vector, the similarity between the one-dimensional nine-grid vector and a nine-grid vector set stored in the mobile device is calculated, when the similarity is larger than a preset recognition matching degree, the matching succeeds, f