ABSTRACT
This paper presents an approach capable for comparing 3D ore bodies, whose surfaces are reconstructed by set of plane figures. The approach is based on the following specific notions: regularity, essential border points and consistency. The regularity presents one edge from the 2D object’s border. Consistency is defined as consecutive connected regularities. Further, each consistency falls apart to four finite numerical sequences. On the basis of the above notions the 3D object’s model is developed as an aspect graph tree. Thus, the problem of 3D ore bodies comparing is reduced to the comparison of finite numerical sequences. To match sequences, a set of rules is given. A software tool is developed on the basis of the presented technique. An experiment is performed in order to validate the theory. Two input files were used for this purpose. Each one contains the 3D co-ordinates and grades of certain points measured by prospective drills in the Moinho ore body, located in Aljustrel Mine, South Portugal. Two ore bodies were reconstructed and compared in 3D.
