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1 – 10 of 110
Article
Publication date: 20 September 2019

Hao Wu, Xiangrong Xu, Jinbao Chu, Li Duan and Paul Siebert

The traditional methods have difficulty to inspection various types of copper strips defects as inclusions, pits and delamination defects under uneven illumination. Therefore…

Abstract

Purpose

The traditional methods have difficulty to inspection various types of copper strips defects as inclusions, pits and delamination defects under uneven illumination. Therefore, this paper aims to propose an optimal real Gabor filter model for inspection; however, improper selection of Gabor parameters will cause the boundary between the defect and the background image to be not very clear. This will make the defect and the background cannot be completely separated.

Design/methodology/approach

The authors proposed an optimal Real Gabor filter model for inspection of copper surface defects under uneven illumination. This proposed method only requires a single filter by calculating the specific convolution energy of the Gabor filter with the image. The Real Gabor filter’s parameter is optimized by particle swarm optimization (PSO), which objective fitness function is maximization of the Gabor filter’s energy average divided by the energy standard deviation, the objective makes a distinction between the defect and normal area.

Findings

The authors have verified the effect with different iterations of parameter optimization using PSO, the effects with different control constant of energy and neighborhood window size of real Gabor filter, the experimental results on a number of metal surface have shown the proposed method achieved a well performance in defect recognition of metal surface.

Originality/value

The authors propose a defect detection method based on particle swarm optimization for single Gabor filter parameters optimization. This proposed method only requires a single filter and finds the best parameters of the Gabor filter. By calculating the specific convolution energy of the Gabor filter and the image, to obtain the best Gabor filter parameters and to highlight the defects, the particle swarm optimization algorithm’s fitness objective function is maximize the Gabor filter's average energy divided by the energy standard deviation.

Details

Assembly Automation, vol. 39 no. 5
Type: Research Article
ISSN: 0144-5154

Keywords

Article
Publication date: 1 September 2000

J. Paul Siebert and Stephen J. Marshall

Describes a non‐contact optical sensing technology called C3D that is based on speckle texture projection photogrammetry. C3D has been applied to capturing all‐round 3D models of…

2412

Abstract

Describes a non‐contact optical sensing technology called C3D that is based on speckle texture projection photogrammetry. C3D has been applied to capturing all‐round 3D models of the human body of high dimensional accuracy and photorealistic appearance. The essential strengths and limitation of the C3D approach are presented and the basic principles of this stereo‐imaging approach are outlined, from image capture and basic 3D model construction to multi‐view capture and all‐round 3D model integration. A number of law enforcement, medical and commercial applications are described briefly including prisoner 3D face models, maxillofacial and orofacial cleft assessment, breast imaging and foot scanning. Ongoing research in real‐time capture and processing, and model construction from naturally illuminated image sources is also outlined.

Details

Sensor Review, vol. 20 no. 3
Type: Research Article
ISSN: 0260-2288

Keywords

Article
Publication date: 11 May 2015

Brendan Luyt

The purpose of this paper is to use selected discussions appearing on the talk pages of the Wikipedia entry on the Vietnam War to shed light on how the wider epistemological…

Abstract

Purpose

The purpose of this paper is to use selected discussions appearing on the talk pages of the Wikipedia entry on the Vietnam War to shed light on how the wider epistemological context of this online encyclopaedia affects the nature of debate about sources and subsequently how this knowledge could be used to improve information literacy instruction.

Design/methodology/approach

My broad approach to the study of the Wikipedia talk pages on the Vietnam War is qualitative in nature and explores the debate over sources through a textual analysis.

Findings

Although much of the debate over sources is conducted without acrimony, the level of analysis one finds in the talk pages is rather shallow while the attention of individual contributors is not overly concentrated.

Originality/value

There have been few studies of individual Wikipedia entries and their talk pages, rather the focus of most of the literature has been on a broad overview of the entire encyclopaedia or a concentration on a set of entries for a particular topic area.

Details

Journal of Documentation, vol. 71 no. 3
Type: Research Article
ISSN: 0022-0418

Keywords

Article
Publication date: 1 September 2004

Xiangyang Ju, J. Paul Siebert, Nigel J.B. McFarlane, Jiahua Wu, Robin D. Tillett and Charles Patrick Schofield

We have succeeded in capturing porcine 3D surface anatomy in vivo by developing a high‐resolution stereo imaging system. The system achieved accurate 3D shape recovery by matching…

Abstract

We have succeeded in capturing porcine 3D surface anatomy in vivo by developing a high‐resolution stereo imaging system. The system achieved accurate 3D shape recovery by matching stereo pair images containing only natural surface textures at high (image) resolution. The 3D imaging system presented for pig shape capture is based on photogrammetry and comprises: stereo pair image acquisition, stereo camera calibration and stereo matching and surface and texture integration. Practical issues have been addressed, and in particular the integration of multiple range images into a single 3D surface. Robust image segmentation successfully isolated the pigs within the stereo images and was employed in conjunction with depth discontinuity detection to facilitate the integration process. The capture and processing chain is detailed here and the resulting 3D pig anatomy obtained using the system presented.

Details

Sensor Review, vol. 24 no. 3
Type: Research Article
ISSN: 0260-2288

Keywords

Article
Publication date: 10 February 2012

Helen Ashton

100

Abstract

Details

Reference Reviews, vol. 26 no. 2
Type: Research Article
ISSN: 0950-4125

Keywords

Article
Publication date: 11 November 2019

Fidel Costa, Christina Widiwijayanti, Thin Zar Win Nang, Erickson Fajiculay, Tania Espinosa-Ortega and Christopher Newhall

The purpose of this paper is to highlight the importance of a comprehensive global database on volcanic unrest (WOVOdat) as a resource to improve eruption forecasts, hazard…

Abstract

Purpose

The purpose of this paper is to highlight the importance of a comprehensive global database on volcanic unrest (WOVOdat) as a resource to improve eruption forecasts, hazard evaluation and mitigation actions.

Design/methodology/approach

WOVOdat is a centralized database that hosts multi-parameter monitoring data sets from unrest and eruption episodes of volcanoes worldwide. Its online interface (https://wovodat.org/) allows interactive data analysis and comparison between volcanoes and eruption styles, which is needed during volcanic crises, as well as to perform basic research on pre-eruption processes, teaching and outreach.

Findings

WOVOdat aims to standardize and organize the myriad of monitoring data types at the global scale. Users can compare changes during a crisis to past unrest episodes, and estimate probabilities of outcomes using evidence-based statistics. WOVOdat will be to volcanology as an epidemiological database is to medicine.

Research limitations/implications

The success of eruption forecast relies on data completeness, and thus requires the willingness of observatories, governments and researchers to share data across the volcano community.

Practical implications

WOVOdat is a unique resource that can be studied to understand the causes of volcanic unrest and to improve eruption forecasting.

Originality/value

WOVOdat is the only compilation of standardized and multi-parameter volcano unrest data from around the world, and it is freely and easily accessible through an online interface.

Details

Disaster Prevention and Management: An International Journal, vol. 28 no. 6
Type: Research Article
ISSN: 0965-3562

Keywords

Article
Publication date: 1 December 1998

Henry C. Mayer

This essay raises the following question “Does economics have an ethical component?”. In this regard, Mayer finds that two distinct perspectives have unique and continuing…

1227

Abstract

This essay raises the following question “Does economics have an ethical component?”. In this regard, Mayer finds that two distinct perspectives have unique and continuing significance: the instrumentalist and the personalist. The first, he says, traces its origins to the very beginnings of economics as a discipline, has dominated economic thought ever since, and denies there is a place for ethics in the science of economics. The second is of more recent origin, has been far less influential in shaping economic thought, and insists that economics indeed has an ethical component because economic affairs are human affairs. Mayer states that John Paul II has contributed to the development of the personalist perspective by insisting that humans are more than mere instrumentalities in the process of production. They are human persons first and foremost, with a moral agency which they bring with them to the workplace and the marketplace.

Details

International Journal of Social Economics, vol. 25 no. 11/12
Type: Research Article
ISSN: 0306-8293

Keywords

Content available
Book part
Publication date: 18 November 2022

Christi U. Edge

Abstract

Details

Making Meaning with Readers and Texts
Type: Book
ISBN: 978-1-80262-337-6

Article
Publication date: 23 November 2010

Jacqueline Chelin

The purpose of this paper is to disseminate information about the development of a work‐based learning (WBL) honours degree top‐up in Library and Information Sciences (LIS)…

650

Abstract

Purpose

The purpose of this paper is to disseminate information about the development of a work‐based learning (WBL) honours degree top‐up in Library and Information Sciences (LIS), focusing on the motivation for this development.

Design/methodology/approach

The context for the work is explained. The characteristics of work‐based learning (WBL) are explored in terms of the relevance to LIS learning and teaching. The rationale for the development of the WBL top‐up is proposed and considerations that need to be borne in mind in the implementation are offered.

Findings

A synergy between the ethos of the existing approach to the education and development of LIS students at the University of the West of England and that of WBL was discovered.

Practical implications

There are implications for the training and development of teaching staff to engage fully and excel in a WBL approach, and for the institution to support this approach. There are also implications for advising employers and potential learners as to the benefits of WBL, and to ensure that it fits appropriately into the professional framework.

Originality/value

The value of the paper is in the sharing of an approach to developing a positive new way of working, how this fits with different government, local and professional agendas and the implications it has for all concerned.

Details

Aslib Proceedings, vol. 62 no. 6
Type: Research Article
ISSN: 0001-253X

Keywords

Article
Publication date: 1 September 1999

Michael R. Smith

Focuses on the approach to interpreting earnings equality found in the writings of a variety of economists and in particular, technological change and its effects on the demand…

Abstract

Focuses on the approach to interpreting earnings equality found in the writings of a variety of economists and in particular, technological change and its effects on the demand skill resulting in earning inequality. Argues that the evidence in favour of the technological effect is weak and presents some alternatives for further consideration.

Details

International Journal of Sociology and Social Policy, vol. 19 no. 9/10/11
Type: Research Article
ISSN: 0144-333X

Keywords

1 – 10 of 110