Correction of image distortion is one of the problems in the field of image processing, especially in the field of automated inspection. A polynomial distortion imaging model is used to establish the conversion relationship between coordinate systems. Based on the LabView platform, the calibration dot matrix is used to calibrate the machine vision system, and the bilinear interpolation algorithm is used to correct the image in different working modes. The experimental results show that the acquired images have been well corrected and the expected results have been achieved.