Download the full-sized PDF of Surface Profiling the Sanding Process of Dry Wall on ConstructionDownload the full-sized PDF



Permanent link (DOI):


Export to: EndNote  |  Zotero  |  Mendeley


This file is in the following communities:

Graduate Studies and Research, Faculty of


This file is in the following collections:

Theses and Dissertations

Surface Profiling the Sanding Process of Dry Wall on Construction Open Access


Other title
Shadow Profilometry
Surface Profiling
Automated Sanding
Type of item
Degree grantor
University of Alberta
Author or creator
Alex, Dony Cherian
Supervisor and department
Behzadipour, Saeed (Mechanical Engineering)
Al-Hussein, Mohamed (Civil and Environmental Engineering)
Examining committee member and department
Behzadipour, Saeed (Mechanical Engineering)
Hahn, Jin-Oh(Mechanical Engineering)
Al-Hussein, Mohamed (Civil and Environmental Engineering)
Hashisho, Zaher(Civil and Environmental Engineering)
Department of Civil and Environmental Engineering
Construction Engineering and Management
Date accepted
Graduation date
Master of Science
Degree level
The growing interest in the industrialization of construction process; promotes opportunities for automation. Automation brings improvement in quality and productivity, while reducing worker’s exposure to hazardous work environments. The integration of robotics in interior finishing works, such as sanding and painting of drywalls is a relatively new concept. Progressing to a stage where fully autonomous robots are used for interior finishing works requires intermediate steps; namely surface profiling. This thesis describes a theoretical concept of shadow profilometery to profile the surface of an installed drywall. A shadow was cast over the area under consideration, and the shadow profile was captured as a 2D image by a camera. Digital image processing techniques were utilized for identifying regions that deviate from a flat surface. The methodology discussed in this research, was tested on a virtual system, and the results were found to be encouraging.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication

File Details

Date Uploaded
Date Modified
Audit Status
Audits have not yet been run on this file.
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 2554081
Last modified: 2015:10:12 13:00:34-06:00
Filename: Alex_Dony_Spring 2011.pdf
Original checksum: 6226cf9118a6344431214854af284a67
Well formed: false
Valid: false
Status message: Unexpected error in findFonts java.lang.ClassCastException: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject cannot be cast to edu.harvard.hul.ois.jhove.module.pdf.PdfDictionary offset=2927
Status message: Invalid Annotation list offset=2510759
Status message: Invalid outline dictionary item offset=2513930
Activity of users you follow
User Activity Date