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Shape from Specularity

 

 

Use of Stereo and Motion Techniques for Solder Joint Inspection

This research was a combination of two techniques to be used for the inspection of solder joints. The first technique, shape from stereo, which suffers from the already under-constrained correspondence problem, is further complicated by the specular nature of the solder joints being inspected. The second technique, shape from motion, used the specular nature of the solder joint to its advantage in the same way that structured highlight inspection does. It tracked the virtual features (an example of which being highlights), to assist in recovering the profile of a solder joint.