1,721,172 research outputs found
3DUNDERWORLD-SLS: A Structured-Light Scanning Software for Rapid Geometry Acquisition
No full text<p><strong>Abstract</strong></p>
<p>Recently, there has been an increase in the demand of virtual 3D objects representing real-life objects. A plethora of methods and systems have already been proposed for the acquisition of the geometry of real-life objects ranging from those which employ active sensor technology, passive sensor technology or a combination of various techniques. In this paper we present the development of a 3D scanning system which is based on the principle of structured-light, without having particular requirements for specialized equip-<br>
ment. We discuss the intrinsic details and inherent difficulties of structured-light scanning techniques and present our solutions. Finally, we introduce our open-source scanning software system ”3DUNDERWORLD-SLS” which implements the proposed techniques both in CPU and GPU. We have performed extensive testing with a wide range of models and report the results. Furthermore, we present a comprehensive evaluation of the system and a comparison with a high-end commercial 3D scanner.</p>
<p> </p>
<p><strong>Version information</strong><br>
[v4]<br>
Lead software developer: Qing Gu<br>
Researchers: Qing Gu, Charalambos Poullis<br>
Immersive and Creative Technologies Lab (http://www.theICTlab.org), Concordia University</p>
<p>[v1-v3.2]<br>
Lead software developer: Kyriakos Herakleous<br>
Researchers: Kyriakos Herakleous, Charalambos Poullis<br>
Immersive and Creative Technologies Lab (http://www.theICTlab.org), Concordia University</p>
<p>Part of the 3DUNDERWORLD project: http://www.3dunderworld.org</p>
<p>IMPORTANT: To use this software, YOU MUST CITE the following in any resulting publication:*</p>
<p>@article{GuHerakleousPoullis3dunderworld,<br>
title={A Structured-Light Scanning Software for Rapid Geometry Acquisition},<br>
author={Gu, Qing and Herakleous, Kyriakos and Poullis, Charalambos},<br>
journal={TBA},<br>
year={2016}<br>
}</p>
<p>@article{DBLP:journals/corr/HerakleousP14,<br>
author = {Kyriakos Herakleous and Charalambos Poullis},<br>
title = {3DUNDERWORLD-SLS: An Open-Source Structured-Light Scanning System for Rapid Geometry Acquisition},<br>
journal = {CoRR},<br>
volume = {abs/1406.6595},<br>
year = {2014},<br>
url = {http://arxiv.org/abs/1406.6595},<br>
timestamp = {Tue, 01 Jul 2014 11:58:08 +0200},<br>
biburl = {http://dblp.uni-trier.de/rec/bib/journals/corr/HerakleousP14},<br>
bibsource = {dblp computer science bibliography, http://dblp.org}<br>
}</p>Github repository: https://github.com/theICTlab/3DUNDERWORLD-SLS-GPU_CP
Reply to Poullis Data capture in aortic registries
No full textWe thank Dr Poullis for his comments [1] on our article [2] and rec-ommendation of his Excel datasheet to record continuous data for variables such as blood pressure, temperature, glucose, lactate and haematocrit. The point that Dr Poullis raises is highly pertinent to sur-gical studies and databases—howmuch data do we need to record? Continuous data recording during surgery is an admirable goal, as it does indeed capture variations in surgical parameters that cannot be extrapolated through simple summary statistics. However, the utility of such a system is questionablewhen comparedwith the effort required to obtain such data (for example, the Excel datasheet that Dr Poullis proposes require data to be inputted manually). The obstacle with implementing such a system that captures continuous surgical parameters is not just the difficulty in reaching a general consensus on its design and format, but ensuring widespread clinical implementation and usage. Adoption of suc
Letter by Poullis Regarding Article, “Visceral Arterial Compromise During Intra-Aortic Balloon Counterpulsation Therapy”
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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