Image geometric correction based on distortion ratio

Distortion in optical lenses for wide field of view application,which reduces image quality,has to be corrected.A new correction method is proposed in this paper,and the distortion correction formula is deduced based on the definition of distortion coefficient.It's easy to correct the distortion with this method when the lens's distortion data is known.A distortion model is presented for the lens with unknown distortion data,through which the distortion data can be calculated.A conclusion for controlling distortion can be obtained by controlling a certain parameter in the distortion model.The practical use of the distortion correction method presented in this paper proved that the model could meet the requirement of distortion correction of lenses in most cases.