| 摘要 |
PURPOSE:To decide on the presence of a flaw easily by shooting a body to be inspected in at least two side directions, recording reflection parts of those images as binary data on every picture element, and ANDing those data. CONSTITUTION:A luminaire 9 emits a laser beam 19 to a body to be inspected (microswitch) 1 slantingly above its rear part (in direction B), and the object is shot by a camera 10 to binary-coding the image 20 on picture element unit basis through a binary coding circuit 11, thus obtaining a binary-coded image. This image has diffused reflection at positions which correspond to a crack 4, a fragment, and an edge part 7 of the body 1 to be inspected and these parts are brigher than any other part, which is utilized to regard the diffused reflection part in the image [1] and other parts as [0], thereby binary-coding every picture element. Said binary-coded image is stored in a storage circuit 12. Similarly, the body 1 to be inspected is further irradiated with the beam 19 slantingly above the rear part (in directin C) to obtain a binary-coded image, which is stored in a storage circuit 13. The image in the circuits 12 and 13 are transferred to an AND circuit 14 to AND data of the same addresses, obtaining a binary-coded image for flaw discrimination. |
