#TITLE_ALTERNATIVE#
ABSTRACT: <br /> <br /> <br /> <br /> <br /> <br /> Deformation analysis is done by analyzing the geometric and the physical state of the deformed object. Analysis of the geometric state is a geodetic work which is done by quantifying the amount of the defo...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/6561 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | ABSTRACT: <br />
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Deformation analysis is done by analyzing the geometric and the physical state of the deformed object. Analysis of the geometric state is a geodetic work which is done by quantifying the amount of the deformation by determining the displacement vector of certain coordinate as a function of time. This research elaborates an alternative method for monitoring the deformation by utilizing the technology of close-range photogrametry (CRP) using a low-cost digital camera. The ability of such camera in detecting the magnitude of a deformation was tested on laboratory scale using a steel shelf as the reference frame and a CRT monitor as the deformed object. An auto-focus Nikon Coolpix 2200 digital camera was used for capturing images of the frame and the deformed object. Stability analysis shows the variation of focal length component as the consequences of using an auto-focus camera. This problem of focal length stability is overcome by self-calibration procedure at every epoch of <br />
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image capturing. Computation of the 3-D coordinates of the frame, object, camera position and the cameras internal parameters are solved simultaneously by bundle adjustment computation. Result of the study case shows that this CRP method using a low-cost digital camera can detects up to 3 mm of deformation or on the scale of 1/2000 of camera to object distance. |
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