| 摘要 |
<p>PURPOSE: To detect the position and shape of a wire by measuring the concentration distribution and concentration of an image and detecting the positions of a plurality of points on a line-shaped object (wire). CONSTITUTION: A wire 37 connects a number of chip terminals 35 of a chip 31 and a lead terminal 36 and performs input/output to a chip 31. The concentration distribution in the direction crossing the wire 37 of a picked-up image is examined and the peak value of concentration is cut by a specific threshold. Then, the center of the cut width is obtained and detected as the center position of the wire 37. Then, the positions of a number of points P1i, P2i - on the wire 37 are obtained and these points P1i and P2i - are connected by a polygonal line and the wire is used as an approximated curve of the wire 37. The length of a straight line for connecting both edges of the approximated curve and the approximated curve or the ratio are compared and the deflection of the wire 37 and the shape are obtained from the difference or ratio of the length, thus judging whether they are proper or not.</p> |
