1994 Volume 7 Issue 5 Pages 168-175
At present, print boad checking devices (called jig) are widely used for electrical checking of multi-layer print boards. To design these devices, it is required to extract points, which correspond to ends of electrical circuits, from the print films. The point extraction work has been done by human beings and it makes their eyes extremely tired.
This paper describes an image processing system for newly developed for automatic point extraction, after feeding print films by one-dimensional line sensor with high resolution.
The features of the system to extract the points are :
(1) Local image processing is carried out on the large amount of data for processing efficiency.
(2) Global processing that signal connection is checked between print boards is incorporated for processing accuracy.
(3) The system is designed to be universal so that multi-layer print boards can be dealt with.