Face recognition method in non-cooperative state

The invention discloses a face recognition method in a non-cooperative state, and the method comprises the steps: S1, building a first face library according to a first image which is a forward face image of a single recognized person; s2, training a face recognition network by using the first face library; s3, a second image is intercepted, and the second image is a face image recognized in the trial operation period of the system; s4, the second image is stored in a first face library to form a second face library, the second image and the corresponding first image are established into a unit image set, and the unit image set comprises face images of each angle of a single recognized person; s5, performing optimization training on the face recognition network by using the second face library; and repeating the steps S3 to S5 for multiple times. The face recognition precision of the network after adjustment and optimization training at various angles can be remarkably improved until the recognition rate spec