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description Publicationkeyboard_double_arrow_right Article 2012Publisher:Elsevier BV Authors: Mohamed Rahayem; Naoufel Werghi; Johan A. P. Kjellander;Mohamed Rahayem; Naoufel Werghi; Johan A. P. Kjellander;Industrial applications like robot-aided welding, automated inspection, and 3D measurements require 3D points to be captured from the surfaces of objects and processed to calculate the information-of-interest. The lack of research focused on fitting ellipses to 3D laser profile data, and the intrinsic features that distinguish it from 2D digital images, motivated us to conduct a comparative study involving the most popular ellipse-fitting methods. After describing our laser profile scanning system, and a survey of ellipse-fitting methods, we compare, using extensive experiments performed with synthetic and real data, the fitting algorithms in terms of stability and accuracy with respect to a variety of factors. The estimate obtained with the best method is used to initialize a robust non-linear iterative ellipse fitting method. Finally, we describe a novel method for the construction of cylindrical surfaces from estimated elliptical sections.
Optics and Lasers in... arrow_drop_down Optics and Lasers in EngineeringArticle . 2012 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.optlaseng.2012.03.014&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu26 citations 26 popularity Top 10% influence Top 10% impulse Average Powered by BIP!more_vert Optics and Lasers in... arrow_drop_down Optics and Lasers in EngineeringArticle . 2012 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.optlaseng.2012.03.014&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2010Publisher:Elsevier BV Authors: Tarig Ali;Tarig Ali;Scale-space theory is a framework originally developed for representing signal and imagery data at different scales through the re-sampling of the original data model. Such a framework allows for explicit, scale-invariant visualization and analysis of this type of data. The implementation of this theory in geospatial engineering is essential especially when processing a high-resolution digital terrain model (DTM) such as that produced from LiDAR data. This would allow for rapid retrieval, analysis, and display of the DTM at application-appropriate resolutions. The DTM is a means of representing the surface of the earth digitally, and it can be a Digital Elevation Model (DEM) or Triangular Irregular Network (TIN) model. DTMs can be produced from a variety of data types including photogrammetric, surveying, Global Positioning System (GPS), and Light Detection And Ranging (LiDAR) data. The availability and popularity of the LiDAR systems, which produce high intensity point clouds require the development of robust techniques for the retrieval, display, and analysis of the data model. This article presents a method based on cubic convolution for robust scale-space representation of DTMs created from LiDAR data.
Optics and Lasers in... arrow_drop_down Optics and Lasers in EngineeringArticle . 2010 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.optlaseng.2009.11.003&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu4 citations 4 popularity Average influence Average impulse Average Powered by BIP!more_vert Optics and Lasers in... arrow_drop_down Optics and Lasers in EngineeringArticle . 2010 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.optlaseng.2009.11.003&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu
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description Publicationkeyboard_double_arrow_right Article 2012Publisher:Elsevier BV Authors: Mohamed Rahayem; Naoufel Werghi; Johan A. P. Kjellander;Mohamed Rahayem; Naoufel Werghi; Johan A. P. Kjellander;Industrial applications like robot-aided welding, automated inspection, and 3D measurements require 3D points to be captured from the surfaces of objects and processed to calculate the information-of-interest. The lack of research focused on fitting ellipses to 3D laser profile data, and the intrinsic features that distinguish it from 2D digital images, motivated us to conduct a comparative study involving the most popular ellipse-fitting methods. After describing our laser profile scanning system, and a survey of ellipse-fitting methods, we compare, using extensive experiments performed with synthetic and real data, the fitting algorithms in terms of stability and accuracy with respect to a variety of factors. The estimate obtained with the best method is used to initialize a robust non-linear iterative ellipse fitting method. Finally, we describe a novel method for the construction of cylindrical surfaces from estimated elliptical sections.
Optics and Lasers in... arrow_drop_down Optics and Lasers in EngineeringArticle . 2012 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.optlaseng.2012.03.014&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu26 citations 26 popularity Top 10% influence Top 10% impulse Average Powered by BIP!more_vert Optics and Lasers in... arrow_drop_down Optics and Lasers in EngineeringArticle . 2012 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.optlaseng.2012.03.014&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2010Publisher:Elsevier BV Authors: Tarig Ali;Tarig Ali;Scale-space theory is a framework originally developed for representing signal and imagery data at different scales through the re-sampling of the original data model. Such a framework allows for explicit, scale-invariant visualization and analysis of this type of data. The implementation of this theory in geospatial engineering is essential especially when processing a high-resolution digital terrain model (DTM) such as that produced from LiDAR data. This would allow for rapid retrieval, analysis, and display of the DTM at application-appropriate resolutions. The DTM is a means of representing the surface of the earth digitally, and it can be a Digital Elevation Model (DEM) or Triangular Irregular Network (TIN) model. DTMs can be produced from a variety of data types including photogrammetric, surveying, Global Positioning System (GPS), and Light Detection And Ranging (LiDAR) data. The availability and popularity of the LiDAR systems, which produce high intensity point clouds require the development of robust techniques for the retrieval, display, and analysis of the data model. This article presents a method based on cubic convolution for robust scale-space representation of DTMs created from LiDAR data.
Optics and Lasers in... arrow_drop_down Optics and Lasers in EngineeringArticle . 2010 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.optlaseng.2009.11.003&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu4 citations 4 popularity Average influence Average impulse Average Powered by BIP!more_vert Optics and Lasers in... arrow_drop_down Optics and Lasers in EngineeringArticle . 2010 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.optlaseng.2009.11.003&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu