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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences 
   
. Vol XXXV, Part B5. Istanbul 2004 
  
  
Figure 3. Construction of gimbal mount 
3. The Method of Observation 
3.1 The Loaction of ObserVation 
This study took a photograph of the cultural heritages 
such as Cheomseongdae and Goseonsaji Samcheung Seoktap 
(national treasure No. 31 and 38) located at Gyeongju-si, 
Gyeongsangbuk-do,  Dansoksaji Dong.Seo  Samcheung 
Seoktap (treasure No. 72 and 73) located at Sancheong-gun, 
Gyeongsangnam-do, and Changnyungsuljeongri Dong.Seo 
Samcheung Seoktap (national treasure No. 34 and treasure 
No. 520) located at Changnyung-gun, Gyeongsangnam-do. 
3.2 Photographing using RC Helicopter 
First, to materialize 3D image of the stone tower shaped 
as an exact squire, it used Ring technology that rotate camera 
into 360*. Second, when snapshot the difficultly approachable 
stone tower, it divided into all eight section to use a tripod 
that can mount a digital video camera to about six meters 
height as Figure 4(a). This camera tripod can stretch into 5 
phases such as 1.70m, 2.59m, 3.52m, 4.70m and 5.51m. 
Third, in order to photograph the top of that, it used RC 
Helicopter photogrammetry system to rotate video camera 
into 360? as Figure 4(b). 
    
    
(a) (b) 
Figure 4. Positions of camera photographing 
This study used VideoCap Pro 2.0 of SAVIT MICRO Co,, 
which provide systems stability and high-definition, to 
capture the photographed digital video dynamic image as a 
static image in the video editing board. Also, it used Power 
Director 2.5 Pro to acquire a static image, which has a 
resolution of 720x480, in the editing software as Figure 5. 
  
Figure 5. Acquisition of static image 
3.3 Digital Photogrammetry Program 
A digital photogrammetry program of this study is a 
method that handles an image data from 3D coordinates of 
the set up photograph, which have attempted a new approach 
for the photogrammetry of the earth. This program used 
Photomodeler 4.0, Digital Close-Range Photogrammetry 
program of EOS System Co., which many studies have been 
in advanced.(C.S Fraser, 1998; L. Dorffner and G. Forkert, 
1998: C. L.. Osgleby, 1999) 
A Photomodeler 4.0 of EOS System Co., which is proud 
of an accurate analysis, is not only easy to acquire the top 
coordinate in the complicated digital image, but also can 
automatically perform all processes that handle image data. 
This study is divided digital image handling process into 
eight phases as Figure 6. 
  
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Figure 6. The flow chart of data processing 
3.4 The Results and Analysis 
Figure 7 diagrammatized Root Mean Square Error 
(RMSE) on the image acquired by Digital Close-Range 
Photogrammetry program. And, Figure 8 diagrammatized the 
mean value of RMSE on it.