Penggunaan penyepadanan imej berdasarkan kawasan dalam fotogrametri jarak dekat bagi pengukuran permukaan struktur

In civil engineering, web deformations of a structure, in particular steel, are useful indicators pertaining to its failure. Present laboratory methods employed in determining the web deformations are through the use of LVDT. This method are difficult were many points needed to be measured before pl...

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Main Author:	Sahdan, Ahmad Yusof
Format:	Thesis
Language:	English
Published:	2006
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/5279/1/AhmadYusofSahdanMFKA2006.pdf
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id	my-utm-ep.5279
record_format	uketd_dc
spelling	my-utm-ep.52792018-02-28T07:55:35Z Penggunaan penyepadanan imej berdasarkan kawasan dalam fotogrametri jarak dekat bagi pengukuran permukaan struktur 2006-01 Sahdan, Ahmad Yusof TA Engineering (General). Civil engineering (General) In civil engineering, web deformations of a structure, in particular steel, are useful indicators pertaining to its failure. Present laboratory methods employed in determining the web deformations are through the use of LVDT. This method are difficult were many points needed to be measured before plotting of the web profile. Measurement may be cannot done because the positions of structure is high or no assessment. This thesis presents the use of close range digital photogrammetry to obtain a three-dimensional model of a deformation web structureâ€™s. Since, photogrammetry has always had the advantage of being able to provide measurements on a large number of points on the object of interest, the representation of the surface deformations would be better. Image correspondence is achieved by using an area-based image matching and centroid matching which makes use of simple surface models. Laboratory tests involving load test on steel Ibeams were performed. Images of the web part under loading were captured using off-the shelf digital cameras that are relatively fixed and calibrated. Whilst the image matching process employs a revised area-based matching algorithm, the image coordinate refinements and the three-dimensional model of the web profile was acquired through elementary photogrammetric operations. Validation of the results was done by means of comparing the photogrammetric output against those obtained from centroid image matching. The results show that the differences between areabased matching and centroid matching approaches are significant which suggest that the former yielded accuracy in the order of 1.5 times better than the latter. This indicates that the use of close-range digital photogrammetry in producing the profile of web deformations is a viable alternative approach to furnish information needed in determining the physical properties of steel structures. 2006-01 Thesis http://eprints.utm.my/id/eprint/5279/ http://eprints.utm.my/id/eprint/5279/1/AhmadYusofSahdanMFKA2006.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Sahdan, Ahmad Yusof Penggunaan penyepadanan imej berdasarkan kawasan dalam fotogrametri jarak dekat bagi pengukuran permukaan struktur
description	In civil engineering, web deformations of a structure, in particular steel, are useful indicators pertaining to its failure. Present laboratory methods employed in determining the web deformations are through the use of LVDT. This method are difficult were many points needed to be measured before plotting of the web profile. Measurement may be cannot done because the positions of structure is high or no assessment. This thesis presents the use of close range digital photogrammetry to obtain a three-dimensional model of a deformation web structureâ€™s. Since, photogrammetry has always had the advantage of being able to provide measurements on a large number of points on the object of interest, the representation of the surface deformations would be better. Image correspondence is achieved by using an area-based image matching and centroid matching which makes use of simple surface models. Laboratory tests involving load test on steel Ibeams were performed. Images of the web part under loading were captured using off-the shelf digital cameras that are relatively fixed and calibrated. Whilst the image matching process employs a revised area-based matching algorithm, the image coordinate refinements and the three-dimensional model of the web profile was acquired through elementary photogrammetric operations. Validation of the results was done by means of comparing the photogrammetric output against those obtained from centroid image matching. The results show that the differences between areabased matching and centroid matching approaches are significant which suggest that the former yielded accuracy in the order of 1.5 times better than the latter. This indicates that the use of close-range digital photogrammetry in producing the profile of web deformations is a viable alternative approach to furnish information needed in determining the physical properties of steel structures.
format	Thesis
qualification_level	Master's degree
author	Sahdan, Ahmad Yusof
author_facet	Sahdan, Ahmad Yusof
author_sort	Sahdan, Ahmad Yusof
title	Penggunaan penyepadanan imej berdasarkan kawasan dalam fotogrametri jarak dekat bagi pengukuran permukaan struktur
title_short	Penggunaan penyepadanan imej berdasarkan kawasan dalam fotogrametri jarak dekat bagi pengukuran permukaan struktur
title_full	Penggunaan penyepadanan imej berdasarkan kawasan dalam fotogrametri jarak dekat bagi pengukuran permukaan struktur
title_fullStr	Penggunaan penyepadanan imej berdasarkan kawasan dalam fotogrametri jarak dekat bagi pengukuran permukaan struktur
title_full_unstemmed	Penggunaan penyepadanan imej berdasarkan kawasan dalam fotogrametri jarak dekat bagi pengukuran permukaan struktur
title_sort	penggunaan penyepadanan imej berdasarkan kawasan dalam fotogrametri jarak dekat bagi pengukuran permukaan struktur
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2006
url	http://eprints.utm.my/id/eprint/5279/1/AhmadYusofSahdanMFKA2006.pdf
_version_	1747814570266722304

Penggunaan penyepadanan imej berdasarkan kawasan dalam fotogrametri jarak dekat bagi pengukuran permukaan struktur

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