A method of using frequency domain filtering to eliminate the crack of cement pavement was proposed by using the dynamic shortest path to obtain the identification result of pavement crack. Firstly the frequency domain filtering was used to eliminate cement road surface groove,and the frequency domain filtering image was divided into non-overlapping 16 * 16 small squares,and then the dynamic shortest path was used to determine whether the squares contained cracks,by the follow-up of binaryzation,crack stitc...