CAD-based inspection using X-ray stereo

An important challenge in industrial metrology is to provide rapid measurement of critical 3D internal object geometry for either inspecting high volume parts or controlling a machining process. Existing metrological techniques are typically too slow to meet this need or can not measure small features with high precision. In this paper, we present an X-ray stereo system which aims to achieve fast 3D geometry measurement from a few X-ray views of a part. We describe the key algorithms in our system and a novel application of it to CAD-based verification of drilled hole positioning. Experimental results are given to illustrate the accuracy of the current system and inspection on a real part