REFIND ORTHO IMAGING AND MODELLING OF RELICS
USING HIGH RESOLUTION AMATEUR CAMERA
Hiroshi YOKOYAMA, Hirofumi CHIKATSU
Tokyo Denki Univ., Dept. of Civil Eng.,
Hatoyama, Saitama, 350-0394 JAPAN
E-mail: {yokoyama, chikatsu} @g.dendai.ac.jp
Commission V, WG V/4
KEY WORDS: Archaeology, Ortho-image, High Resolution, Visualization
ABSTRACT:
In order to reduce time and labour for drawing of archeological artifacts, ortho imaging and drawing system was developed by the
authors. However, there are some issues which need to be resolved before this system may become operational. These problems
include imaging for shadow areas occurring in hollow areas on complicated relics or faint areas at the top of columnar relics and lack
of image quality.
This paper reports refind ortho imaging system using high resolution amateur camera and shows the improved results.
1. INTRODUCTION
Many archaeological sites are being excavated every year in
Japan, and an abundance of relics have been found from those
sites. These relics have to be drawn by archaeologist for
archival record taking great time and labour and skill. In order
to reduce drawing work, the authors have been concentrating
on developing real time ortho imaging and drawing system
using CCD camera.
However, imaging for shadow areas occurring in hollow areas
on complicated relics or faint areas at the top of columnar
relics such as shown in Figure 1 are still issues. Chikatsu
(1998) reported imaging approach for this problem using
spline interpolation and TIN model. Nevertheless, lack of
image quality was still issue.
On the other hand, the number of pixels of amateur cameras are
amazingly increasing by modern semiconductor and digital
technology, and functionary for transmission of image to PC is
standardized. In these circumstances, it is expected that refined
ortho imaging system using high resolution amateur cameras
instead of CCD cameras.
This paper reports development of refined ortho imaging
system using high resolution amateur cameras.
2. REFINED ORTHO IMAGING SYSTEM
Figure 2 shows refined ortho imaging system and Table 1
shows system components.
Shadow Area
Faint Area
Fig.1 Ortho Projection Image with lack of images
This system consists of one axis actuator and line lasers, high-
resolution amateur camera and PC. High resolution amateur
camera (Minolta Dimage7) was used in this investigation
instead of CCD camera since the Dimage7 have bulb function
and live broad cast mode. Line images which show only outline
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