parator as follows. Let both camera of A7 be 
horizontal, and giving adequate b,, we remove the 
vertical parallax by b, of the right camera and 
horizontal parallax by z, for each point indepen- 
dently. Then the photograpic coordinates (x, yD) 
of left camera are given by 
nua og, 
2 z 
Vi - —Jo d 
where (x, y) are the measured coordinates and 
(X», Vo) are that of the principal point of the photo- 
graph. 
The photographic coordinates (x, y») of the 
right camera are given by 
X3—X,—b, / 
2 
yey +L 
for base inside. For base outside b. becomes 
negative. 
     
Though this method has some advantages, it 
seems it has less accuracy than the method of 
independent measurement. Because it is quite 
natural that measurments by five movements X, 
y, Z, b, and b,, may have more chances to intro- 
duce errors than that by two movement x and y, 
only. 
2. The equation of conformal transformation 
(6) can be reformed as follows, 
X=Xo+Ax—By+(Cx—Dy)x—(Dx+Cy)y 
Y=Y,+Bx+Ay+ (Dx+Cy)x+ (Cx—Dy)y. 
In this equation we may assume that. 
AX — AM x cos 40 — AM y sin 40 
AY — AM x sin 40 4- AM y cos 40 
and it follows at once 
4M? — (C? D?) (x? - y?). 
For more accurate computation, this correction 
factor of scale shall be introduced in equation (5) 
for absolute orientation.