SURFACE INSPECTION SYSTEM

PROBLEM TO BE SOLVED: To shorten an inspection time by detecting the presence of a deep machining mark to estimate the position and size thereof. SOLUTION: This surface inspection system 9 is constituted so as to inspect the inside surface 3A of the bore 3, which is formed to a cylinder block 5 by boring processing to be polished, on the basis of the digital brightness image 70 of the inside surface 3A of the bore 3 and equipped with an evaluating image forming part 55 forming the unidimensional power spectrum image 71 in the direction crossing the direction of a cut processing mark P at a right angle along the direction of the cut processing mark P on the basis of the digital brightness image 70 and arranging the digital brightness image 70 and the unidimensional power spectrum image 71 in parallel to form an evaluating image 73 and an evaluation part 57 evaluating the presence of the polishing residue Q of the inside surface 3A of the bore 3 on the basis of the pixel value of the respective pixels of the evaluating image 73. COPYRIGHT: (C)2011,JPO&INPIT