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What is Point cloud

Encyclopedia of Information Science and Technology, Fourth Edition
Points at a virtual space resulting from scans that represent an object surface but only reconstructing the location of benchmarks or targets.
Published in Chapter:
3D Scanning and Simulation of a Hybrid Refrigerator Using Photovoltaic Energy
Edith Obregón Morales (Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Mexico), José de Jesús Pérez Bueno (Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Mexico), Juan Carlos Moctezuma Esparza (Universidad Politécnica Metropolitana de Hidalgo, Mexico), Diego Marroquín García (Universidad Tecnológica de San Juan del Río, Mexico), Arturo Trejo Pérez (Universidad Tecnológica de San Juan del Río, Mexico), Roberto Carlos Flores Romero (Universidad Tecnológica de San Juan del Río, Mexico), Juan Manuel Olivares Ramírez (Universidad Tecnológica de San Juan del Río, Mexico), Maria Luisa Mendoza López (Tecnológico Nacional de México, Instituto Tecnológico de Querétaro, Mexico), Juan Carlos Solís Ulloa (Instituto Tecnológico Superior de Cintalapa, Mexico), Yunny Meas Vong (Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Mexico), and Víctor Hugo Rodríguez Obregón (Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Mexico)
Copyright: © 2018 |Pages: 20
DOI: 10.4018/978-1-5225-2255-3.ch110
Abstract
In this chapter, a methodology that starts from the measurement and recording of real prototype geometries up to simulations to evaluate parameters, improvements or performance under various conditions is proposed. Here it is presented a case study of a solar powered refrigerator with storage capacity for 50 kg of fruit. The refrigerator comprises two systems, vapor-compression and Peltier. The methodology consisted in acquiring by a 3D laser scanner or Coordinate Measuring Machine (CMM) and in some small complex items using a 3D photogrammetry scanner. These data were transferred first as a CAD or SolidWorks® geometry and subsequently transferred to domains geometry useful for ANSYS or COMSOL simulation software. These models with high-resolution brings the simulations closer to real prototypes. As a source of direct information from the prototypes, thermal images obtained using a thermographic camera were taken. Also, wireless sensors were installed for temperature and humidity monitoring. The analyses of the energy efficiencies of both prototypes were performed.
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More Results
Contribution to the Technical Interpretation of the Roman Sacred Architecture by the New Survey Methods: Case Study – The Nameless Temple of Tipasa, Algeria
A set of three-dimensional distributed points which result from a laser or photogrammetry scan. Each point cloud is calculated by matching several photographs (in the case of photogrammetry survey) so as it corresponds to a point of the surface of the surveyed object. The density of a point cloud is dependent on the quantity and quality of the photos taken, but also on the followed protocol of the shooting.
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Humans Enter the Age of Avatarism
A set of data points in space, generally produced by 3D scanners and used to represent 3D objects in visualization, animation, rendering and 3D manufacturing applications ( https://en.wikipedia.org/wiki/Point_cloud ).
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Impact of Industry 4.0 in Architecture and Cultural Heritage: Artificial Intelligence and Semantic Web Technologies to Empower Interoperability and Data Usage
Dataset composed by points located in a three-dimensional coordinate system derived from both a range and an image based geometrical survey.
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The Advantages of Using Laser Scanners in Surveying in Protected Sites: A Case Study in Historical Peninsula in Istanbul
Created by 3D scanners; is a set of data points in three-dimensional coordinate system which define by X, Y, and Z coordinates.
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“Discretizzazione” and Data Analysis at the Time of “Total Survey”
Set of points that define a three-dimensional model of an object. Each of these points is identified by its position in space and its colour characteristics.
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3-D Digitization Methodologies for Cultural Artifacts
The collection of points in 3-D space resulting from scanning an object
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Virtual Reality and Point-Based Rendering in Architecture and Heritage
Set of vertices or points in a three-dimensional coordinate system. These vertices are usually positioned in 3D space and have a set of coordinates (x, y, z). These sets of points normally are representative of the external surface of an object.
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Semantic Representation of Accurate Surveys for the Cultural Heritage: BIM Applied to the Existing Domain
It is a set of data points defined by X, Y, and Z three-dimensional coordinates, often intended to represent the external surface of an object.
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Comparative Study of Graphic Representation Methods on Architectural Heritage
A three-dimensional coordinate system that represent the external or internal surface of an object created by 3D scanners or photogrammetry.
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Use of Laser Scanner for Digital Surveying of the Sarnicli Inn and the Byzantine Cistern Underneath
Created by 3D scanners and also is a set of data points in three-dimensional coordinate system which define by X , Y , and Z coordinates.
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Models for Design: From Geometries to Generative Algorithms
points collected in the digital space produced by a survey of a 3D shape. The set of points is the discrete representation of a real form.
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Using Augmented-Reality to Aid in Lego Construction: A Mobile Application
A set of data points in 2D or 3D space that are obtained from 3D scanners or depth cameras.
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Augmented Reality-Based Training Systems for Teaching Health and Safety Procedures in Construction
Set of vertices that represents the surface of objects and helps the AR applications to recognize the patterns to locate the augmented content relative to it.
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A Virtual Journey through 2D and 3D Elaborations Recorded with Range-Based and Image-Based Method: The Experience of Vitelleschi Palace in Tarquinia
A point cloud is a set of data points in some coordinate system. In a three-dimensional coordinate system, these points are usually defined by X, Y, and Z coordinates, and often are intended to represent the external surface of an object. Point clouds may be created by 3D scanners or multi-image processing based on digital photogrammetric shooting.
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Laser Scanning for the Evaluation of Historic Structures
Set of points collected from a laser scanner. 3D image captured with the scanner.
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Algorithms for Geometrical Models in Borromini's San Carlino alle Quattro Fontane
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