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DEVELOPMENT OF CONVENIENT 3D MEASUREMENT USING CONSUMER
GRADE DIGITAL CAMERA: THE 3DIVISION EXAMPLES
Misato Iwamoto, Hirofumi Chikatsu
Dept, of Civil and Environmental Engineering, Tokyo Denki University
350-0394, Hatoyama, Saitama, Japan - (07smg05@ms, Chikatsu@g).dendai.ac.jp
Commission V, WG V/2
KEY WORDS: Close-range Photogrammetry, Triplet images, Calibration, Software, Digital Cameras, 3D Modelling
ABSTRACT:
The authors have been concentrating on developing a convenient 3D measurement method using consumer grade digital cameras,
and software “3DiVision” has been designed to perform convenient 3D measurements under the key words; 3Dimension, Digital
image and Visualization. “3DiVision” has shown the capability to compute both exterior and interior orientation parameters
simultaneously without GCP on the object space. There is still, however, issue which need to be confirmed before the 3DiVision
may become operational. The problem is multipurpose use in various application fields.In order to confirm multipurpose use of the
3DiVision, the examples of the 3DiVision are given in this paper. In particular, cliff was measured by consumer grade digital
camera from the view point of application to civil engineering, and it was confirmed that the accuracy for the horizontal, vertical
cross sections and the volumes are almost same results compare with terrestrial laser scanning results.
1. INTRODUCTION
Recently, pixel numbers of consumer grade digital cameras are
amazingly increasing, and there are many low-priced
consumer grade digital cameras on the market. For example,
14 Mega consumer grade digital cameras have already
appeared on the market in March, 2008. In these circumstances,
convenient 3D measurement using consumer grade digital
cameras are enormously expected in various application fields.
Therefore, performance evaluations for consumer grade digital
cameras have been investigated from the view point of digital
Photogrammetry (Fraser, 1997; Kunii, et al., 2001, Noma, et
al., 2002; Habib, et al., 2003). On the other hand, software for
digital photogrammetry “3 Division” was designed to perform
convenient 3D measurement using consumer grade digital
cameras by the authors (Chikatsu, et al., 2002), and
“3DiVision” was improved using triplets images (Chikatsu, et
al., 2006). However, there is still issue for multipurpose use of
the 3DiVision in various application fields.
In order to confirm multipurpose use of the 3 Division, triplet
images for various objects such as cliff from the view point of
application to civil engineering, stone Buddha, huge ginkgo
and damaged car from the view point of conservation of
cultural assets and industrial measurement were taken by
consumer grade digital cameras. After brief explanation of the
3 Division, various examples of the 3 Division are given in this
paper.
2. 3DiVision
The parameters in 3 Division are exterior orientation
parameters for the three cameras (left, center, right), and
interior orientation parameters which is common to three
cameras. The main algorithms of the 3DiVision is
simultaneous adjustment for triplet images, and the 3Division
have capability to perform exterior and interior orientation
simultaneously without GCPs. Figure 1 shows concept of the
3DiVision, and Figure 2 shows calibration procedures.
Figure 1. Concept of the 3DiVision
1. Relative orientation
2. Exterior orientation
using scale D
3. Generation of quasi-GCP
4. Self-calibration of center
camera using quasi-GCP
5. Simultaneous adjustment
for triplet images.
Figure 2. Calibration procedures