International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B2. Istanbul 2004
For video scripts, types of viewing method, route or filming
position etc are stored. Figure 6 shows some typical symbols
representing the registered imagery, and overlaid with
cartographical maps.
x
b) Oblique Imagery
c) Video - vertical & moving c) Video - oblique & moving
d) Video — moving on the ground €) video - pan
f) Video — multiple view g) Video - fixed & vertical
Figure 6 Examples of symbols representing the spatial
information of imageries
Besides the original imagery resources, analytical results such
as change detection or simulation results are as important for
decision support. Therefore the proposed system also provides a
group of functions that include binarization, contour tracing,
vectorization, and import into GIS. Error allowance for
vectorization can also be specified according to the requirement
of precision in the GIS operations that will follow.
Figure 7 to 9 show a serious of processing results by the above
functions. Figure 6 shows the original result of change detection,
proposed by a parallel project group of the author's institute
(Sakamoto 2001). Figure 7 shows the result of binarization, by
the specified threshold, Figure 8 the result of contour tracing
and vectorization, by the specified threshold of error. The small
circles are the representative point of the vectorized polygon.
By comparing the degree of overlapping between the changed
polygons and those of houses, we can easily identify the
damaged buildings. Figure 10 shows examples of such
operation by the hashed building polygons.
TA SB notru VI3184& X 9335, Y. ana T ABM MAR 2128
Figure 7 Original result of change detection
BEES E E ERA DUCTU. SALLE X Qu. Y 92 gGUnBH uL. (2004/00/19
Figure 8. The result of binarization
The ect eX DUCES,
Figure 9. The result of contour tracing an vectorization
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