Computer system, method and medium

The invention relates to the technical field of animation production, and discloses a computer system which comprises a frame image extraction module used for extracting a frame image from a three-dimensional animation video; the figure recognition module is used for recognizing a figure from the frame image and acquiring figure posture data; the key frame extraction module is used for screening the frame images to obtain a key frame sequence; the attitude sequence correction module is used for firstly extracting a key frame sequence corresponding to the first person and then marking key frames; the reference sequence correction module is used for marking the key frames of the key frame sequence of the third person; the key frame sequence synthesis module is used for extracting a reference key frame sequence; synthesizing each reference key frame sequence with the key frame sequence of the first person; according to the method, reference image mapping can be carried out on the key frame needing hand drawing i