| 摘要 |
PROBLEM TO BE SOLVED: To detect a paint defect or a change state of an inner surface which are difficult to be detected by a conventional inspection method, and to thereby improve the accuracy of inner surface inspection, when inspecting the inner surface state of a can having the painted inner surface. SOLUTION: Image data of the can inner surface are acquired by imaging the inner surface of the can 1 by a camera 32 before a paint film formed by painting applied to the inner surface of the can 1 is dried, and the inner surface state of the can 1 is determined based on the image data. Normal image data wherein the inner surface state of the can 1 after being painted is normal are converted into a gradation numerical value showing a density difference and held beforehand, and a difference is checked by comparing a normal numerical value with a numerical value based on inspection image data acquired by the camera 32. The can 1 is discriminated to be nondefective one in the case where the difference is within a prescribed range, and to be defective one in the case of out of the prescribed range. COPYRIGHT: (C)2009,JPO&INPIT
|
