| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for detecting a joint which surely detects the outline of the joint of a thing to be joined and a joining object, and a method for inspecting the external appearance of the joint which enables stable inspection by using the method. SOLUTION: In the method for detecting the joint, the outline of the joint formed, for instance, by welding a terminal of a component to a terminal on a substrate is detected. The method includes a joint imaging process Pr1 for imaging an area including the joint, an inspection area setting process Pr2 for setting an inspection area so that it includes the joint in relation to a picked-up image, a candidate point extracting process Pr3 for calculating the amount of change in a shade value in relation to a nearby pixel, for each pixel in the inspection area, and extracting the amount of change in the shade value as a candidate point forming the outline, when the amount is larger than a preset threshold, an outline forming process Pr4 for forming the outline by linking the candidate points in a plurality together, and an outline detecting process Pr5 for detecting the outline located at the most distant position from the center of the joint, as the outline of the joint, when the plurality of outlines are detected. COPYRIGHT: (C)2010,JPO&INPIT |
