An integrated visual system for solder inspection
G. Odawara, T Kurokawa, Y. Tamiya, T. Fujii · 2003
A technique is described for real-time solder joint inspection for printed wiring boards. It uses reflection on the specular solder surface projected by a straight-shaped light source (a straight fluorescent tube). For image processing, modified Hough transformation is adopted to approximate the image of the fluorescent tube reflected on a solder joint to a straight line. These processes are performed on special-purpose hardware to achieve video-rate processing. Experimental results have demonstrated sufficient detection capability.>