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Case
Studies |
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This
project was undertaken by Eos Systems
to demonstrate PhotoModeler's ability
to compare a damaged vehicle against
an undamaged vehicle all within the
same session thereby producing accurate
crush measurements. Two cropped photographs
of a crushed 1997 Corolla were provided
and no information about the camera
used to take the photos was available.
Our first step was to find an exemplar
undamaged vehicle at a local car dealer
Photos were taken of it using our
own calibrated camera. Then we used
PhotoModeler to model the exemplar
vehicle, paying special attention
in modeling the area around the front
bumper. We also modeled areas that
appear undamaged in the crushed-vehicle
photographs to help us link the two
models together.
With
an exemplar model in place, we used
PhotoModeler Pro's Point Properties
feature to freeze the 3D points on
the exemplar model to act as control
points. Next, we imported the crushed
images into the same project and set
them for Inverse Camera processing.
Once we marked and referenced points
from the exemplar vehicle with matching
points on the crush photos, we were
able to perform Inverse Camera, orient
the images, then continue marking
on the crush images. To complete the
project, we performed distance and
comparison measurements to extract
crush displacements. These measurements
were all made within PhotoModeler
eliminating the need for an external
CAD program. |
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In
2002 the 8 metre, 70 ton Merlion, the icon
of SIngapore, was moved from its existing
location at the mouth of Singapore River to
a new location about 230m away at Marina Bay.
Precise measurement and documentation were
required in case any damage was sustained
during the difficult move that involved crane
and barge transport.
The
statue was surveyed, documented and modeled
by a team of surveyors led by Loi Hwee Yong
of Presentus Pte Ltd., Singapore. Over 20,000
3D points were generated within PhotoModeler
to create this incredibly detailed model from
about 200 photos. The Merlion was reopened
to the public on September 15, 2002 - 30 years
after its first opening at its former site. |
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