APUTER 
  
9801 RAS1 
  
100V 
“entroid: 
X,8Y) 
he 
re 
0 
  
  
387 
Y ,W.X 
ZY «X 
DE A WT 
/ \ 
J N 
  
[XYZ1] = T [xy01] 
Ax: 30° Az: 60° 
Ti Ti 0 Ti 
T= 1 Lt 720 Tan Az45" ^ AcOU 
T3; T4; 0 T,, 
T4 T2 44 
( Ti r Tux ) X + ( T;-Tux ) Y + ( Tai T44x ) Z + ( Tar TAX ) = 0 
(Tir Thy) X + (TorToy) Y € CHzTu4y) Z £(TzzZ Tuy ) 70 Fig.5 Variation of the intersection angle of the optical axis : 
30, 45, 60, 90 degrees. 
Fig.4 Three dimensional coordinates of the objects are 
calculated from output of ARTIST G140 using Direct Linear F 
Transformation Method without self calibration. 
  
  
  
  
gE 
. 30 45 60 90 6 points 8 points 
--X a pO? Fig.7 The effect of the number of control points was 
  
  
  
  
Fig.6 When the intersection angle was 60 degrees, mean evaluated. 6 or 8 control points were set up at the position 
residual was minimum. showed. 
6 points 8 points 
X Y 7 r X Y 277770. 
minimum residual -1.65 -0.92 -2.53 0.03 -2.34 -0.99 -3.09 0.02 
maximum residual 1.39 1.59 2.52 2.70 1.26 1.16 2.33 3.18 
average residualsum of squares 0.22 0.35 0.55 0.99 0.23 0.12 1.03 1.05 
  
  
  
r4X-YHZ  (X10!mm) 
Table 1 The intersection angle was 60 degrees. Residuals of these objective points were calculated. 
IAPRS, Vol. 30, Part 5W1, ISPRS Intercommission Workshop “From Pixels to Sequences”, Zurich, March 22-24 1995