An Algorithm to Restore a Curved Object from Three Orthographic Views by Using Probabilistic Relaxation Matching Method

We present an algorithm to restore an curved object from drawings. Three ortho4raphic views are utilized to represent many mechan~cal parts, polihedral objects, etc. Previous research have been proposed methods restoring objects automatically. We already proposed a method of restoring a polyhedral object from three orthographic views drawn with only straight lines. In this research, we developed this method to apply for curved lines in the drawing. Both our methods are able to determine the correspondence of true planes with candidate planes by probabilistic relaxation matching method, in spite of input data includes an error. And we describe algorithm to restore an object from three orthographic views included not only circle and arc but also other curved lines. It carry out by using multi-stage extraction algorithm and fluency function.

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