CYLINDRICAL BODY SURFACE INSPECTION DEVICE AND CYLINDRICAL BODY SURFACE INSPECTION METHOD

摘要

The present invention includes a light irradiation unit configured to irradiate a cylindrical body with light; a two-dimensional imaging unit arranged at a position to receive reflected light from the surface of the cylindrical body on which light emitted from the light irradiation unit is reflected; a scanning-position determination unit configured to determine at a predetermined period, with respect to the two-dimensional image data acquired by the two-dimensional imaging unit, a scanning position that is a scanning position in a first direction of the two-dimensional image data and is corresponding to a circumferential direction of the cylindrical body; a time-series scanning image generator configured to perform extraction of image data in a second direction perpendicular to the first direction at a scanning position determined by the scanning-position determination unit, out of the two-dimensional image data, on a plurality of pieces of the two-dimensional image data acquired by the two-dimensional imaging unit and to generate a time-series scanning image by arranging in chronological order in the first direction each piece of extracted image data of the second direction; and an inspection unit configured to inspect the time-series scanning image and detect a defect image.