Shape difference visualization for ancient bronze mirrors through 3D range images

Abstract

Japanese archaeologists have paid special attention to ancient Chinese bronze mirrors because the mirrors may provide a key for the exact location of Yamatai State, which is one of the major archaeological controversies. Currently, archaeologists visually analyse ancient Chinese bronze mirrors for their shape difference. The practice requires a huge amount of time and effort. In this paper, we propose an automatic method for detecting the shape difference between a pair of ancient mirrors. The 3D data of the mirrors are obtained using a laser range scanner. Our algorithm then aligns them into the same coordinate and visualizes their shape differences. Our proposed algorithm provides fast and non‐damaging analysis for shape difference. Further analysis can be evaluated on our data instead of the actual mirror, so it can be performed by more than one group of archaeologists. Copyright © 2003 John Wiley & Sons, Ltd.

Image-based rendering of intersecting surfaces for dynamic comparative visualization

“…However, only a few techniques have been presented for comparing shape locally [12,13]. Local distance measures often require establishing some form of correspondence between the surfaces (i.e., domain matching).…”

“…Local distance measures often require establishing some form of correspondence between the surfaces (i.e., domain matching). A commonly used method for visualizing local distance measures is to display these on one of the two surfaces using an appropriate color map [12,14,15]. This has the disadvantage that only one of the surfaces is shown; the shape of the second surface is not obvious.…”

Three dimensional visualization and comparison of impressions on fired bullets

“…In the field of Japanese archaeology, Masuda et al [4] have analyzed shape difference of ancient bronze mirrors with a method of computer vision. In this study, we apply this method to identification of bullets.…”