A. Boutarfa, N.-E. Bouguechal, and H. Emptoz
CAD model-based vision, registration, segmentation, automation, inspection system
The stated contribution of the paper is the development of a new method for an automated inspection system for manufactured parts. The use of range sensors allows very significant improvement in acquisition speed, but without attaining the accuracy obtained with coordinate measuring machines (CMM). Moreover, the improvement of the dimensional and functional inspection of industrial parts in computer-integrated manufacturing which in the major part of time is carried out in a traditional way. With these requirements in mind, we brought a solution to these problems by using directed object programming: C++. This method is made up of three modules: a first one registries the CAD model of a part and its 3D data obtained with an active optical range sensor, the second module segments the homogeneous cloud of 3D points in areas representing each surface of the object, and the third one is a visual check of the dimensions of the part and it outputs a file results or displays the area errors. The computing times are now 1 s for a model STL made up of 25,000 triangles put in correspondence with an image made up of 20,000 points and about 3 s for the same image put in register with the same object represented with its model NURBS.
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