Abstract: In the mathematical coordinate system, establish an imaging mathematical matrix model for rotating images, and analyze the transformation relationship between the digital model matrix of the world coordinate system and the image coordinate system. Using short-time Fourier transform (STFT) sliding window function to preprocess this information, a sequence similarity based autocorrelation calculation method based on parabolic interpolation is proposed to analyze the one-dimensional signal function and calculate the bearing rotation period. Briefly describe the image processing flow of the computer system, and finally build a simulation platform for simulation verification.