| 摘要 |
PROBLEM TO BE SOLVED: To set an optimum photographic condition, by adjusting the peripheral velocity of the outer-periphery surface of a non-cylindrical body, the focusing position of a camera, and the orientation direction of a camera that opposes the outer-peripheral surface, when photographing the outer-periphery surface of the non-cylindrical body by a camera. SOLUTION: In the process for rotating the non-cylindrical body 1, photographing a photographing range S of an outer-periphery surface 3 by the camera 4 pointing to the outer-periphery surface 3 of the non-cylindrical body 1, and inspecting the outer-peripheral surface 3 by processing an image photographed by the camera 4 by using an image processing section 5, rotational speed N of the non-cylindrical body 1 is adjusted from control data measured, in advance, the peripheral velocity V of the outer-periphery surface 3 in the photographic range S is made constant, the camera 4 is moved onto a normal line 6 on the outer-peripheral surface 3 within the photographing range S, while keeping the distance between the outer-periphery surface 3 in the photographing range S and the camera 4 at a focal distance F, by moving the camera 4 in the focal direction, thus allowing the camera 4 to point to the photographing range S. COPYRIGHT: (C)2010,JPO&INPIT
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