IMAGE PROCESSOR, IMAGE PROCESSING METHOD, IMAGE PROCESSING PROGRAM, PRINTED MATTER INSPECTION DEVICE, PRINTED MATTER INSPECTION METHOD, AND PRINTED MATTER INSPECTION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a precise and high-speed image processor and method for removing an uneven positional slippage or a geometric distortion such as expansion/contraction in an inspection image without being influenced by an image quantity defect.

SOLUTION: A divided image formation part 21 forms divided images for each of a reference image and the inspection image which are to be mutually collated, a divided projection waveform formation part 22 forms a divided projection waveform from each divided image, and a projection waveform composition part 23 combines the divided projection waveforms to form a projection waveform. A characteristic quantity extraction part 12 extracts a characteristic quantity from the formed projection waveform. A characteristic quantity matching part 13 performs the matching of the characteristic quantity data of the reference image with the characteristic quantity data of the inspection image. A correction quantity calculation part 14 determines a correction quantity to the geometric distortion between the reference image and the inspection image to form a n-dimensional lookup table 15. An image collation part 16 performs the collation between the reference image and the inspection image considering the geometric distortion by use of the lookup table 15.

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