Hongo, Kenji 
  
3 EXPERIMENT 
We conducted an experiment to investigate performance and user-friendliness of the developed system in May 1999. 
The experiment was mainly for image acquisition subsystem and ortho-image generation subsystem. The object of the 
experiment was a mural painting of Shomyoji, one of the famous temples in Yokohama, J apan. The mural painting on 
the wooden board is 3.6 m wide and 2.4 m high. 
4 pairs of index images (2 columns by 2 rows) were necessary to be acquired due to limited space in front of the wall. 
At that time the object distance was approximately 2 m. 30 detailed images (6 columns by 5 rows) were acquired with 
the object distance of approx. 0.8 m. The spatial resolution of the mosaic ortho-images of index images and detailed 
images are 1.25 mm and 0.625 mm respectively. Figure 7 shows an example of a pair of index images and Figure 8 
shows examples of detailed images. 
   
    
   
Figure 7. Example ofa pair of index images of a mural painting of Shomyoji 
  
Figure 8. Examples of detailed images of a mural painting of Shomyoji 
Figure 9 shows the whole of a mosaic index image of the mural painting. This image was utilized for processing of 
detailed images. Figure 10 shows the whole and a part of a mosaic detailed image respectively. Some area with not 
uniform brightness can be found in Figure 10 (a). This was caused by halation at the surface of the mural painting, and 
indicates that photography of the old paintings on wooden board is a little difficult. 
There were some inconvenient parts found in the system through the experiment. Most of them were as far as user- 
friendliness and no serious problem in performance was found. All problems found through the experiment have been 
fixed. 
  
378 International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B5. Amsterdam 2000. 
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