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SCENE MODELING BY USING VIDEO CAMERA 
Tsukasa Hosmura **, Tetsuo Ohta" 
* Tokyo Denki University, Ishizaka, Hatoyama-machi, Hiki-gun, Saitama, 350-0394, Japan 
hosomura@)ia.dendai.ac.jp 
b Taiyo Survey, 2-114-8, Imaisurugi-machi, Oyabe, Toyama, 932-0051,Japan 
Commission V, WG V/2 
KEY WORDS: Photogrammetry, Urban, Modeling, Camera, Experimental 
ABSTRACT: 
By putting the video camera on the mount, which rotates at the steady speed, and taking the images of 360 degrees. It would be able 
to easily realize the 3D measurement of the object. In this study, such system was produced experimentally, and measurement 
accuracy was examined. 
1. INTRODUCTION 
Generally, 3D measurement of most equipment uses the 
principle of the triangular measure. There are several methods 
for example stereo method using the binoculus, spot projected 
method, pattern projected method and moire topography, etc. 
Stereo method is the passive method, other methods are active 
method, which projects the light. Stereo method using two 
cameras is called the binoculus stereoscopic vision. This 
method can be got 3D information of all points in the scene. 
However, it is difficult to find out the corresponding point in 
both scenes. In 3D modeling of the landscape, distance 
measurement of plural point on the object is sufficient for 
modeling in most cases. It is possible to calculate the distance to 
the corresponding point, which has reflected on the scene 
obtained from many directions on the horizontal surface. But, it 
is difficult to get many directions from stile camera. It was 
considered to use of video camera for this situation. By 
putting the video camera on the 
mount, which rotates at the steady 
speed, and taking the images of 360 
degrees. It would be able to easily 
realize the 3D measurement of the 
object. In this study, such system was 
produced experimentally, and 
measurement accuracy was 
examined. 
2. OUTLINE OF THE SYSTEM 
This system has been composed of 3 
components. These are digital video 
camera (SONY, Digital 8 Handycam, 
DCR-TRV310K), servomotor ( FUJI 
ELECTRIC, GYCIOIDCI-S ) and 
decelerate gear system. This gear 
system is used to rotate the camera in 
fixed minutes. This system is shown 
in Figure 1. Lower part is servomotor. 
Rotating time of camera can be 
changed several steps. Middle part is 
decelerate gear system. Rotating speed of servomotor is too fast 
for obtaining object images. Decelerate gear system can be slow 
down the rotating speed of servomotor. Top part is video camera. 
This camera can get object images by 720pixels x 400 lines at 
30 scenes per one minute. 
3. MEASURING METHOD OF THE DISTANCE 
This equipment is set at plural positions (for example, camera A, 
camera B, camera C and so on) on the identical circumference, 
and video scenes of 360 degree circumferences are obtained, 
and the images are incorporated in personal computer by the 
frame rate ( 30 scene/second ) equal to the general television 
system. By putting the video camera on the mount, which 
rotates at the steady speed, and taking the images of 360 degrees. 
It would be able to easily realize the 3D measurement of the 
object. By counting the scene number of one camera (for 
  
Figure 1. Video camera system used in this study 
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