309 
Observation system 
Photo stage(s) 
Display 
r 
terminal 
Positioning and 
A 
measuring devices 
t 
Main 
1 Geometric (real-time) 
Computer 
processors 
I 
i 
Control agents 
Control 
(XYZ) 
unit 
ilPPU tj_ 
Output 
devices 
Fig. 3: Analytical system 
An analytical system can be converted to a hybrid system by 
installing, e.g., digital CCD cameras, a fast storage device for 
images, fast communication lines, image processors, and an image 
display monitor (figure 4). 
| Image j j Display 
j monitor j iterminal 
Observation 
system 
r 
Ï _ _ 
1 
J 
1 
Photo stage(s) 
AD 
Image 
Image 
! 
i 
Positioning and 
measuring 
Image 
storage 
(input- 
output) 
processors 
vertical 
Main 
devices 
computer 
Geometric 
:(real-time) 
•*- 
. 
t 
processors 
iControl agents 
Control 
Unit 
(input) 
(XYZ) 
Output 
devices 
! 
Fig. 4: Hybrid system 
Digital systems include an autonomous (external) scanner/digitizer 
for AD conversion of full images with a fast mass-storage device. 
Their main components are fast communication lines, fast image 
processors, and preferably a high-resolution image display monitor 
(figure 5). They contain a minimum of the mechanical and optical 
components.