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1 – 10 of 301
Article
Publication date: 2 August 2011

Jun‐Bao Li, Meng Li and Huijun Gao

Computer‐aided fragmented cultural relics repair is an effective method instead of manual repair. The purpose of this paper is to provide a 3D digital patching system for…

Abstract

Purpose

Computer‐aided fragmented cultural relics repair is an effective method instead of manual repair. The purpose of this paper is to provide a 3D digital patching system for computer‐aided cultural relics repair through using the scanned 3D data of fragmented cultural relics. It includes processes and tools that can be effectively used for fragmented cultural relics repair.

Design/methodology/approach

An automatic 3D digital patching for fragmented culture relics repair is designed. The framework includes a surface segmentation based on region dilation, feature extraction based on height‐map, pair matching and multi‐block matching.

Findings

The paper finds that the proposed 3D data patching is an efficient method for fragmented cultural relics repair.

Practical implications

Early and effective planning and implementation of computer‐aided fragmented cultural relics repair can significantly improve the reliability and availability of fragmented cultural relics repair.

Originality/value

The paper presents a uniform framework of 3D digital patching for fragmented cultural relics repair.

Details

Assembly Automation, vol. 31 no. 3
Type: Research Article
ISSN: 0144-5154

Keywords

Article
Publication date: 30 November 2017

Arzu Vuruskan and Susan P. Ashdown

The design and testing of clothing for activewear requires complex assessments of the suitability of the clothing when the body is in motion. The purpose of this paper is…

Abstract

Purpose

The design and testing of clothing for activewear requires complex assessments of the suitability of the clothing when the body is in motion. The purpose of this paper is to investigate full body 3D scanning of active body poses in order to develop “watertight” digital models and half-scale dress forms to facilitate design, pattern making and fit analyses. Issues around creating a size set of scans in order to facilitate fit testing of activewear across a size range were also explored.

Design/methodology/approach

Researchers experimented to discover effective methods for 3D body capture in the cycling position and reconstruction of the body in a reliable way. In total, 25 cyclists were scanned and size representatives were selected from these participants. Methods of creating half-scale forms were developed that make optimum use of modern materials and technologies. Half-scale dress forms were created in two active positions in a range of sizes for fit testing and design. A set of half-scale and full-scale bike shorts in two styles were manufactured and fit tested on the half-scale forms compared to fit testing on the scan participants to test validity of this method of assessing fit.

Findings

Issues in capturing and reconstructing areas occluded in the scanning process, and reconstructing the interface with the bicycle seat were addressed. Active digital forms were developed across the size range, from which both digital avatars and physical mannequins were developed for pattern development and fit testing. The production and use of precisely half-scaled tools for garment testing was achieved and validated by comparing fit test results in active positions on the half-scale forms and on participants who were scanned to create these forms.

Originality/value

Design modifications for active positions to date are based on linear measurements alone, which do not define the 3D body adequately. Despite much research using body scanners, only limited data exist on the body in active poses, and the concept of creating half-scale forms by scanning fit models throughout the size range in active body positions is a novel concept. The progress made in resolving material and process experiments in creating the actual half-scale forms, and testing their suitability for fit testing provides a basis for further research aimed at developing similar dress forms for other activewear garments.

Details

International Journal of Clothing Science and Technology, vol. 29 no. 6
Type: Research Article
ISSN: 0955-6222

Keywords

Book part
Publication date: 10 June 2019

LauraAnn Migliore, Kevin Bottomley and Bridget Arena

Technology is changing more rapidly than most companies can implement it. This chapter presents a digitized Human Resource Development (dHRD) Framework Model that…

Abstract

Technology is changing more rapidly than most companies can implement it. This chapter presents a digitized Human Resource Development (dHRD) Framework Model that organizational leaders can use to meet the needs of current and future workforces via avatar-mediated learning in 3D virtual learning environments (VLEs). The dHRD Framework Model leverages 3D VLE technology as a tool to engage employees and achieve strategic objectives in an efficient and cost-effective manner for managing people. The dHRD Framework Model can inform practice and advance employee engagement outcomes for effective HR decision-making, which includes legal and ethical considerations for mitigating risks in the 3D VLE. The Theory of Gamification, including psychological theories, provides the lens to explain dynamic learning and relationship building using the dHRD Framework Model to engage employees in the 3D VLE.

Details

Advances in the Technology of Managing People: Contemporary Issues in Business
Type: Book
ISBN: 978-1-78973-074-6

Keywords

Article
Publication date: 11 April 2018

Abdalmenem Owda, José Balsa-Barreiro and Dieter Fritsch

Representative cultural heritage sites and monuments around the world have been lost or damaged by natural disasters, human conflicts and daily erosion and deterioration…

Abstract

Purpose

Representative cultural heritage sites and monuments around the world have been lost or damaged by natural disasters, human conflicts and daily erosion and deterioration. Documentation and digital preservation by using three-dimensional (3D) modeling techniques enables to ensure the knowledge and access for future generations. Efficient working methods and techniques should be proposed for this purpose.

Design/methodology/approach

In this paper, a methodology for the generation of 3D photorealistic models of representative historical buildings is introduced, for using data are obtained using terrestrial laser scanning systems and photogrammetry.

Findings

In this paper, an approach to reconstruct 3D photorealistic models by using laser scanning and photogrammetric data is shown. Combination of data from both sources offers an improved solution for 3D reconstruction of historical buildings, sites and places. Integration of 3D models into virtual globes and/or software applications can ensure digital preservation and knowledge for next generations.

Research limitations/implications

Results obtained in a concrete building are shown. However, each building or studied area can show some other different drawbacks.

Practical implications

The study enables to generate 3D and four-dimensional models of most valuable buildings and contribute to the preservation and documentation of the cultural heritage.

Social implications

The study enables digital documentation and preservation of cultural heritage.

Originality/value

A proper solution at field (in a real and complicated case) is explained, in addition to the results, which are shown.

Article
Publication date: 2 March 2012

Maja Stanic, Branka Lozo and Diana Gregor Svetec

The purpose of this paper is to evaluate and discuss colour properties, stability and lightfastness after accelerated exposure in xenon‐arc light apparatus, of 3D ink jet…

1237

Abstract

Purpose

The purpose of this paper is to evaluate and discuss colour properties, stability and lightfastness after accelerated exposure in xenon‐arc light apparatus, of 3D ink jet prints produced by using 3D colour printing process.

Design/methodology/approach

3D colour prints were produced using ZCorporation 3D printing method. The samples were divided into groups according to the finishing process applied (untreated, finished with different infiltrants). Colorimetric properties were measured using spectrophotometer. Samples were placed into xenon‐arc based weathering apparatus (Xenotest), using the preset glass filtered sunlight, standard indoor conditions. Colour stability was evaluated as change in colour after repeating the spectrophotometer measurements and comparing spectral and specific colorimetric values of initial and exposed samples.

Findings

Based on methodology used, the analysis has shown the changes in colour appearance of differently finished 3D prints, which were mostly attributed to chroma and lightness variations. The colour stability of samples studied noticeably varied and is dependent on colour, percentage of ink coverage and finishing method. Issues of colour and stability of 3D ink jet prints could become important as 3D printing emerges into new application areas, in which the object properties will need to be maintained for a certain amount of time.

Research limitations/implications

The research is comparative and is limited to the specific materials and procedures used.

Originality/value

The paper describes aspects of colour 3D printing for which the published research and literature data are still, for the most part, lacking. Colour measurements methodology and evaluation of stability described could be of value for further research and for users of the technology.

Details

Rapid Prototyping Journal, vol. 18 no. 2
Type: Research Article
ISSN: 1355-2546

Keywords

Book part
Publication date: 13 September 2018

Lionel Taito-Matamua, Simon Fraser and Jeongbin Ok

This research addresses the grave issue of plastic waste in the Pacific. By using Samoa as a case study, it was considered that distributed recycling combined with 3D

Abstract

This research addresses the grave issue of plastic waste in the Pacific. By using Samoa as a case study, it was considered that distributed recycling combined with 3D printing offers an opportunity to (1) repurpose and add new value to this difficult waste stream and (2) engage diverse local communities in Samoa by combining notions of participatory design with traditional Samoan social concepts. Fieldwork in Samoa established the scope of the issue through interviews with stakeholders in government, waste management businesses, the arts and crafts community and education. Based on the information obtained from the fieldwork, potential product areas and designs were explored through material and 3D printing experiments using low-cost, open-source equipment. The experiments informed the design of speculative scenarios for workable, economically viable, socially empowering and sustainable systems for repurposing and upcycling plastic waste, which then enabled production of practically useful and culturally meaningful 3D printed objects, artefacts and products. Building upon the outcome and with a view towards implementation, Creative Pathways, an educational initiative aimed at propagating 3D printing and contextual design, was established and is being delivered in local schools.

Details

Unmaking Waste in Production and Consumption: Towards the Circular Economy
Type: Book
ISBN: 978-1-78714-620-4

Keywords

Article
Publication date: 31 January 2011

Boppana V. Chowdary, Ayanna‐Rene De Noon, Fahraz Ali and Clement A.C. Imbert

The purpose of this paper is to provide a comprehensive work flow for the improvement of the Reverse Engineering (RE) process in producing non‐uniform rational B‐splines…

Abstract

Purpose

The purpose of this paper is to provide a comprehensive work flow for the improvement of the Reverse Engineering (RE) process in producing non‐uniform rational B‐splines (NURBS) models from scanned point cloud data. This should become a reliable guide in the creation of desired 3D‐CAD models in order to improve efficiency of downstream operations and further to make decisions regarding quality control.

Design/methodology/approach

The paper deals with a detailed investigation of operations in achieving an object's accuracy in the data editing phase and data fitting phase that employs the use of a 3D scanner. A case example involving the ShapeGrabber® AI310 laser scanner was used in digitizing the physical object. Operations considered for investigation at the data editing phase include relaxation, decimation of triangles and sharpening of edges. Contour detection, construct patches, target patch count, grid construction and grid resolution are selected as the operations for investigation in the data fitting phase. Evaluation of the generated digitized models was carried out by performing tests which include 3D Comparisons and Geometric Dimensioning and Tolerance (GD & T) testing.

Findings

The process of data editing is considered to be extremely time consuming which requires a high degree of skill in order to carry out the data manipulation steps. For the purpose of investigation, an electrical socket cover was considered as the object for digitization. The study found some contributors to enhance the quality of the digital model that can be used in the first piece inspection. The results indicate that although the operations associated with the data fitting phase affect the overall quality of the digitized model; they are however, limited by whatever the quality achieved at the data editing phase.

Practical implications

The RE work flow described in this research will assist designers and practitioners in improving both the efficiency and effectiveness of design and manufacturing functions.

Originality/value

The data editing and fitting processes are time consuming due to various adjustments necessary in obtaining a NURBS model from the digitized data. Thus, the proposed RE work flow identified the steps to realize the desired CAD models from the point cloud data. Moreover, from this study, practitioners will get a concise overall understanding about which geometrical features need to be adjusted so that the required model can be achieved; instead of the need to develop this procedure by themselves through the process of trial and error.

Details

Journal of Manufacturing Technology Management, vol. 22 no. 1
Type: Research Article
ISSN: 1741-038X

Keywords

Article
Publication date: 1 May 2007

Hu Jin-lian and Xin Binjie

This paper presents a digital imaging method based on silhouette image analysis to visualize the 3D surface roughness of textile or other flexible materials. A prototype…

Abstract

This paper presents a digital imaging method based on silhouette image analysis to visualize the 3D surface roughness of textile or other flexible materials. A prototype of imaging system consisting of five components was developed: visible lighting source (white backlighting), sample stage, progressive sample feeding equipment, detector (CCD camera) and software. A sequence of silhouette images of textile surface patches could be digitalized progressively when the sample passes through the sharp edge of crossbeam in bending status, so that the whole 3D surface profile could be generated by the combination of silhouette height profile of each surface patch in sequence. This non-destructive testing method is effective for surface roughness characterization or defects detection of flexible materials; it could reconstruct a pure 3D surface profile of textile surface while discarding the information of surface color so as to avoid the fusion of shadows and dark colors, which is impossible to be implemented based on the traditional 2-D image analysis.

Details

Research Journal of Textile and Apparel, vol. 11 no. 2
Type: Research Article
ISSN: 1560-6074

Keywords

Article
Publication date: 12 April 2018

Abdul Fatah Firdaus Abu Hanipah and Khairul Nizam Tahar

Laser scanning technique is used to measure and model objects using point cloud data generated laser pulses. Conventional techniques to construct 3D models are time…

Abstract

Purpose

Laser scanning technique is used to measure and model objects using point cloud data generated laser pulses. Conventional techniques to construct 3D models are time consuming, costly and need more manpower. The purpose of this paper is to assess the 3D model of the Sultan Salahuddin Abdul Aziz Shah Mosque’s main dome using a terrestrial laser scanner.

Design/methodology/approach

A laser scanner works through line of sight, which indicates that multiple scans need to be taken from a different view to ensure a complete data set. Targets must spread in all directions, and targets should be placed on fixed structures and flat surfaces for the normal scan and fine scan. After the scanning operation, point cloud data from the laser scanner were cleaned and registered before a 3D model could be developed.

Findings

As a result, the reconstruction of the 3D model was successfully developed. The samples are based on the triangle dimension, curve line, horizontal dimension and vertical dimension at the dome. The standard deviation and accuracy are calculated based on the comparison of the 21 samples taken between the high-resolution and low-resolution scanning data.

Originality/value

There are many ways to develop the 3D model and based on this study, the less complex ways also produce the best result. The authors implement the different types of dimensions for the 3D model assessment, which have not yet been considered in the past.

Details

International Journal of Building Pathology and Adaptation, vol. 36 no. 2
Type: Research Article
ISSN: 2398-4708

Keywords

Open Access
Article
Publication date: 18 January 2022

Srinimalan Balakrishnan Selvakumaran and Daniel Mark Hall

The purpose of this paper is to investigate the feasibility of an end-to-end simplified and automated reconstruction pipeline for digital building assets using the design…

Abstract

Purpose

The purpose of this paper is to investigate the feasibility of an end-to-end simplified and automated reconstruction pipeline for digital building assets using the design science research approach. Current methods to create digital assets by capturing the state of existing buildings can provide high accuracy but are time-consuming, expensive and difficult.

Design/methodology/approach

Using design science research, this research identifies the need for a crowdsourced and cloud-based approach to reconstruct digital building assets. The research then develops and tests a fully functional smartphone application prototype. The proposed end-to-end smartphone workflow begins with data capture and ends with user applications.

Findings

The resulting implementation can achieve a realistic three-dimensional (3D) model characterized by different typologies, minimal trade-off in accuracy and low processing costs. By crowdsourcing the images, the proposed approach can reduce costs for asset reconstruction by an estimated 93% compared to manual modeling and 80% compared to locally processed reconstruction algorithms.

Practical implications

The resulting implementation achieves “good enough” reconstruction of as-is 3D models with minimal tradeoffs in accuracy compared to automated approaches and 15× cost savings compared to a manual approach. Potential facility management use cases include the issue and information tracking, 3D mark-up and multi-model configurators.

Originality/value

Through user engagement, development, testing and validation, this work demonstrates the feasibility and impact of a novel crowdsourced and cloud-based approach for the reconstruction of digital building assets.

Details

Journal of Facilities Management , vol. 20 no. 3
Type: Research Article
ISSN: 1472-5967

Keywords

1 – 10 of 301