| 摘要 |
An image of the filter end faces of a bundle of cigarettes arranged side by side with axes thereof paralleled is acquired as an inspection image, and the diameters of the individual cigarettes of the bundle in the inspection image are obtained and compared with normal diameters associated with the respective cigarettes in the inspection image, to determine axial displacement of cigarettes from the bundle (first determination section). Also, the centers of gravity of the end faces of the individual cigarettes are obtained, and based on the difference between an inter-center-of-gravity distance which is the distance between an outermost cigarette in the bundle and its adjacent cigarette, and an inter-center-of-gravity distance which is the distance between adjacent cigarettes located in the central part of the bundle and belonging to the same tier as the outermost cigarette, axial displacement of the outermost cigarettes is determined (second determination section).
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