Abstract
Restoration of earthenware fragments is an important task in archaeology. Earthenware fragments excavated from archaeological sites are restored by hand, but there is a risk of defacement or damage to the fragments. Computer-aided restoration methods have been proposed. For example, there is a system in which fragments are arranged on a twodimensional panel and assembled by the user as if they were a puzzle. For efficient assembly, it is important to clarify the vertical direction of each fragment. For this purpose, a method has been proposed to estimate the vertical direction from a point cloud, assuming that a fragment is placed on a desk. However, this method may result in estimating an inverted posture. Therefore, this paper proposes a method for accurately estimating the vertical direction of a fragment by linear regression using a three-dimensional point cloud. In addition, the fragments were initially placed in a two-dimensional panel based on the vertical direction of the fragment and the radius of the circle approximated from each cross-section of the fragment. Subsequently, the system was developed to virtually assemble the fragments in three-dimensional space by interactively manipulating the fragments on the two-dimensional panel.
Study on Earthenware Fragment Assembly System Based on Estimating Spatial Arrangement of Earthenware Fragments
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