ISPRS Commission III, Vol.34, Part 3A ,Photogrammetric Computer Vision“, Graz, 2002 
  
  
   
  
  
  
  
  
  
  
Case (1) Case (2) Case (3) 
i Model (1) EB Model (2) © Model (3) © Model (4) 
Figure 4-a. Second System RMS Errors (mm), X Direction 
  
   
  
  
  
0.8 uus 
0.6 s 
0.4 P 
E | 
0.2 | 
0 ES T 1 
Case (1) Case (2) Case (3) 
@ Model (1) Æ Model (2) L1 Model (3) © Model (4) 
Figure 4-b. Second System RMS Errors (mm), Y Direction 
  
  
  
  
  
  
  
Case (1) 
8 Model (1) @ Model (2) O Model (3) O Model (4) 
Case (2) Case (3) 
Figure 4-c. Second System RMS Errors (mm), Z Direction 
5. CONCLUSIONS 
1- The best mathematical model for the treatment of the 
geometric errors introduced during the scanning process is 6- 
paramters transformation model. 
2- The (B/H) ratio must be considered during the imaging 
process in order to achieve similar accuracy in the X, Y,Z 
ground coordinates. 
3- The accuracy of the ground coordinates extracted from the 
digital images captured by scanning hardcopy images could 
reach sub millimeter accuracy with high quality scanning 
resolution (1200dpi) and good (B/H) ratio. 
4- The accuracy of the low resolution digital cameras could 
reach sub millimeter with good (B/H) ratio. 
A - 101 
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