(c)
Figure 7. Overview of the image block: (a) Galaxy S, (b) S2
type A, and (c) S2 type B.
The image triangulation was conducted in accordance with
presence or absence of consideration of the interior orientation
(IO) parameters determined by camera calibration. In case IO
parameters were taken into account in the static experiment, the
results from triangulation for any smartphone type were within
1.5 pixel (RMSE), which was improved at least by 35%
compared to when IO parameters were not taken into account.
On the contrary, the improvement effect of considering IO
parameters on accuracy in triangulation for smartphone images
in dynamic experiment was not significant compared to the
static experiment. It was due to the significant impact of
vibration and sudden attitude change of UAV on the actuator
for automatic focus control within the camera built in
smartphone under the dynamic condition.
4. CONCLUSIONS
This paper introduced a new photogrammetric UAV system
using the smartphone technology. Although these results
showed slightly lower accuracy than the results using existing
system consisting of expensive sensors, they seems to be
satisfactory in terms of cost and efficiency in that they were
generated by only one smartphone. And this paper assessed the
feasibility of smartphone as a payload for photogrammetric
UAV system. Considering that these results were obtained from
only 1 smartphone, they suggest that smartphone is not only
very feasible as a payload for UAV system but also play direct
or indirect roles loaded to UAV system. In addition, it is
expected that the performances of MEMS sensors built in
smartphone e will develop continuously, which in turn will
increase the use of smartphone as a payload for
photogrammetric UAV system in the future.
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6. ACKNOWLEDGEMENTS
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This work was researched by the supporting projec
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