Abstract
In most cases, earthenware is broken when it is excavated from ruins, earthenware is restored manually. However, the restoration requires technical knowledge and experience. In addition, restoration work of a relic is a risk for damaging earthenware pieces. Therefore, as a research to support the restoration of earthenware using a computer, a study to restore the earthenware using the adjacent information of the earthenware pieces is presented. However, in previous method the initial placement of the earthenware pieces is done manually and the burden on the user is heavy. In this paper, we propose a method to estimate the vertical direction and height position based on the 3D measurement point cloud of the earthenware piece. After cutting the 3D point cloud on multiple planes, each cross section is approximated by a circle, and the vertical direction and height position of the earthenware piece are estimated based on the center points and radius of the circles. This method was applied to two earthenwares, and it was possible to estimate accurately with a large piece of earthenware.
