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The aberration is the biggest problem of fisheye lens, for this situation, we propose an algorithm to correct the aberration of fisheye lens by using double ellipse model, which can improve the aberration of fisheye and guarantee the real-time output at the same time; we scan and detect the edge of fisheye image, use the linear fitting method to obtain the optical center and radius of fisheye image, find the mapping relationship between the image before and after correction by double ellipse model After the experimental comparison, the aberrations caused by the fisheye lens are corrected and can be output in real time.