The geometry distortion adjustment is an important content in the digital image processing. Picture with geometry distortion must be eliminated these distortions before being carried on the detection and the quantitative analysis. It is still a topic that has not been able very good to solve to carry on the adjustment to non-linear geometry distortion of the optics imagery system, and some methods cannot be well practical. This article has analyzed the imagery process of the image which includes the non-linear geometry distortion caused by abnormality of the short focal distance imagery system. This article introduced one method of project adjustment, which carries on the numeral adjustment to the short focal distance camera lens distortion. The method is firstly to discover the algorithm of the radial direction distortion through establishing the lens distortion model, and then to discover the concrete adjustment method through the primitive the picture having been revised by using the optics imagery basic rule and to figure out the value of the key point k1 and the k2, finally to realize the process under the VC++ environment and to perform to the procedure to debug. The experimental results indicate that this method has the practical and simple characteristic.
Keywords: Short focal distance, Radial distortion, Geometrical distortion, Geometric rectification
