38
as large as possible. This is demonstrated in the following example. A test object
consisting of 18 points in two planes is photographed using a wide angle camera
with the geometric conditions given in Fig. 7. The weight and correlation num
bers are given in Table 1 for Ah = 0.1 h and in Table 2 for Ah = 0.5 h. If we
use a test object with 4 planes (9 points in 3 planes and 18 points in the 4th) as
indicated in Fig. 8 to calibrate a normal angle camera with rectangular picture
we obtain the weight and correlation numbers in Table 3.
Fig. 7.
Geometric properties of
photography of a three-di
mensional test object con
sisting of eighteen point in
two planes. The weight
and correlation numbers of
the corresponding solution
are given in Tables 1 and
2.
7-
h
‘Table 1. Weight and correlation numbers. Wide angle. Ah — 0.1 h.
*0
c
cX 0
,y 0
cZ 0
C CO
c cp
C X
*0
21.49
^0
0
21.49
c
0
0
38.21
c*o
19.38
0
0
18.37
cY 0
0
19.38
0
0
18.37
c Z Q
0
0
—36.00
0
0
34.01
C CO
0
0.80
0
0
0
0
0.64
c cp
—0.80
0
0
0
0
0
0
0.64
C X
0
0
0
0
0
0
0
0
0.12