th
Grey value noise Flight path errors RES NM oe eh
DTM
2; [grey levels] 2, [m] 2; [mgrad] stand. dev. [m] mean [m]
(1) 0.0 0.0 0.0 12 0.09
(2) 3.0 0.0 0.0 1.50 0.10
(3) 12.0 0.0 0.0 3.50 0.39
(4) 0.0 0.4 0.08 2.51 0.15
(5) 12.0 0.4 0.08 4.69 0.17
(6) 0.0 1.0 0.2 6.89 0.81
(7) 12.0 1.0 0.2 8.01 1.63
(8) 0.0 2.0 0.4 19.86 2.33
(9) 12.0 2.0 0.4 19.09 1.07
Table 4.2: Numerical results of simulation
5. FUTURE ASPECTS
There exist various possible extensions of our approach.
The introduction of a non-regular grid DTM adapted
according to the roughness of the terrain, and the consi-
deration of breaklines and discontinuities within the
DTM can be achieved by altering the geometric object
model. The simultaneous extraction of breaklines and
discontinuities is more complicated to realize.
A special feature of 3-line cameras is a different resolu-
tions in each channel. For instance the MOMS camera
has a resolution of 4.5 m for the nadir, 13.5 m for the
other stereo channels. The matching process can be
adapted to different resolutions. It should yield signifi-
cantly better results than those obtained from the coar-
ser level only.
The simultaneous estimation of the parameters of exte-
rior orientationin the least squares adjustment is already
incorporated in the presented approach. As shown abo-
ve this it is necessary for any practical application. Such
investigations have still to be carried out.
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