Fisheye lens have the characteristics of short focus and wide-angle, which makes the fisheye image correction algorithms become hot topics in the field of image research currently. An ellipsoid correction model is put forward. All feature points are obtained by using edge detection algorithm, and the correct feature points are also obtained by using the pseudo-feature-point elimination method. The correction model parameters are obtained with the correct feature points. The grid image is taken as an example to conduct the research. As a result, the detection of the feature points is accurate and the correction effect is good. It is proved that this model is accurate and efficient.