The digital image has distortion because the inherent characteristic of imaging optical system in measuring body's scale through high precision measurement system based on the CCD camera was used as a core component. The distortion model of 3^th polynomial was found based on primary aberration theory. The scale rebuild was progressed after analyzing and validating the excellence and defect of different interpolation method. The image' s noise contrapose one of correction methods filter off. The correction image is approve of fitting high precision imaging measurement through experimentation.