and (8) are preseted in colum 3, 4 and 5. Of course all of
the results are wrong and the mistakes are too difficult to
detect by the single criterion itself. The asterisks in
6th colum indicate the mistakes detected by r€0.50. Anyhow
all the mistakes can be detected by the dual criterion of
Organd Pf, (asterisks in colum 7 ).
Table 4 Gross error detection
Expected, loro, Matching Results Error Detection
Pa rallax : r = max | 0 = max | P,= min r Xo5, a AND p,
Pur m 104 96 | 80 96 0.52 .
F 73 105 97 | T 97 | 0.63 | .
P Um» | 105 | 97 | 81 | 97 0.57 .
[^ 5 | 107 107 rd 91 | 107 0.97 | .
76 | 108 92 | 92 | 108 | 0.65 *
76 3 108 EP. us 108 | 116 | 0.62 | ,
Fe | 108 | 116 116 108 0.57 | .
78 | 110 | 118 118 86 0.55 | .
81 | 113 121 121 89 "09:491 — ! :
81 | 113 89 121 89 | * 0.40 | .
83 | peor {orm 123 91 --—.9.39 4 .
(c) A testing window
This experiment is carried out for verifying the feasibility
Of the dual criterion. The photo data ana scanning parameters
are presented in Table 5.
Table 5 Photo data and sampling parameters
Principle Distence 114.207 mm
Photo Format 18x 18cm
Photo Scale = 1:16000
Scanning Interval in x/y bo/fo A
Pixel Size 50 x Sur 8)
CE Testing Window Pha 1024 x 2000 P1 X 1
Terrain Type Mountain(parallax 8.6mm) -
The epipolar geometry and the hierarchic structure(Makarovi €
1980) of 6 frequency channels are applied in this experiment.
Matching is performed along the profiles parallel to epipolar
lines and with interval of 0.4 mm in photo scale. The paral-
laxes obtained from previous profile is entered into the
next as the initial position and matching in a higher frequency
- 424 =