| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technology that does not incorrectly recognize a part other than a defective part as defective even when the shape of a surface varies irregularly during imaging. Ž<P>SOLUTION: (A) When a flexible sheet-like article or the like is imaged while being conveyed, concentration irregularity can be generated in an image by deformation during conveyance. The whole image is divided into two inspection regions A1 and A2, the most frequent value (150) of the concentration is determined in an inspection region A1, a pixel of a concentration lower than the most frequent value is extracted, and adjacent pixels are coupled to each other. The coupled pixels are set as a processing area AD, and the maximum value (100) of the concentration among them is determined. (B) Then, the concentration in the processing area AD is gradation-corrected with the ratio (150/100) of the most frequent value and the maximum value, the influence of shape variation is removed, and then a defect is inspected. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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