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Article

Lounis Chermak, Nabil Aouf and Mark Richardson

In visual-based applications, lighting conditions have a considerable impact on quality of the acquired images. Extremely low or high illuminated environments are a real…

Abstract

Purpose

In visual-based applications, lighting conditions have a considerable impact on quality of the acquired images. Extremely low or high illuminated environments are a real issue for a majority of cameras due to limitations in their dynamic range. Indeed, over or under exposure might result in loss of essential information because of pixel saturation or noise. This can be critical in computer vision applications. High dynamic range (HDR) imaging technology is known to improve image rendering in such conditions. The purpose of this paper is to investigate the level of performance that can be achieved for feature detection and tracking operations in images acquired with a HDR image sensor.

Design/methodology/approach

In this study, four different feature detection techniques are selected and tracking algorithm is based on the pyramidal implementation of Kanade-Lucas-Tomasi (KLT) feature tracker. Tracking algorithm is run over image sequences acquired with a HDR image sensor and with a high resolution 5 Megapixel image sensor to comparatively assess them.

Findings

The authors demonstrate that tracking performance is greatly improved on image sequences acquired with HDR sensor. Number and percentage of finally tracked features are several times higher than what can be achieved with a 5 Megapixel image sensor.

Originality/value

The specific interest of this work focuses on the evaluation of tracking persistence of a set of initial detected features over image sequences taken in different scenes. This includes extreme illumination indoor and outdoor environments subject to direct sunlight exposure, backlighting, as well as dim light and dark scenarios.

Details

Kybernetes, vol. 43 no. 8
Type: Research Article
ISSN: 0368-492X

Keywords

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Article

Kym Thorne, Alexander Kouzmin and Judy Johnston

The purpose of this paper is to explore the “ethics and transparency‐accountability” paradox in which the oft‐repeated mantras of ethical luminosity, such as transparency…

Abstract

Purpose

The purpose of this paper is to explore the “ethics and transparency‐accountability” paradox in which the oft‐repeated mantras of ethical luminosity, such as transparency and accountability, appear designed to assure one that all is well when such confirmation is, possibly, no more than part of an illusion – a superficiality purporting to confirm that what is seen is the only reality of public ethics.

Design/methodology/approach

Utilizing an analytical approach based on the comparative analysis of historical and contemporary isomorphisms this paper suggests that despite post‐modern voices about fracture, the multiplicity of “realities” and possible futures, there still remains an almost paradigmatic conviction that “visibility” is politically more efficacious than “invisibility.” Rendering situations visible supposedly exposes violations of ethical standards, professional norms and protects one from “criminogenic” elites. This paper questions whether light always cast out darkness and whether “Dark Times” demand relentless transparency?

Findings

This paper finds that constructing “realities” has always involved a manipulation of what is seen and not seen – what is real and what is illusionary. “Shadows” and “disorder” are also important in understanding how visibility, invisibility and ethics are parts of the pervasive apparatus of political and economic hegemony. This paper also finds that the translucence of accountability policies, supposedly encompassing the pillars of professional propriety/integrity, might be encompassed within Offe's “procedural ethics”.

Social implications

The social implications of this paper involve the development of a public administration able to calibrate whether the fluxing of visibility/invisibility/ethics is constructive or destructive of social capital and legitimacy.

Originality/value

This paper concludes that a public administration solely focused on transparency not only misdirects attention and political resources, but also is actually self‐defeating, leaving citizens less informed and more subjugated than before.

Details

Asia-Pacific Journal of Business Administration, vol. 4 no. 1
Type: Research Article
ISSN: 1757-4323

Keywords

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Article

J.M. Rolfe

THE flight deck is the aircrew's primary point of contact with the aeroplane. Unlike the rest of the aeroplane which is designed with the specific objective of exceeding…

Abstract

THE flight deck is the aircrew's primary point of contact with the aeroplane. Unlike the rest of the aeroplane which is designed with the specific objective of exceeding human capabilities the flight deck must be designed with human limitations very much in mind.

Details

Aircraft Engineering and Aerospace Technology, vol. 48 no. 11
Type: Research Article
ISSN: 0002-2667

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Article

TO MEET the demands of a wide range of air‐to‐ground and air‐to‐air and other roles called for under modern warfare conditions, the MRCA is fitted with an advanced and…

Abstract

TO MEET the demands of a wide range of air‐to‐ground and air‐to‐air and other roles called for under modern warfare conditions, the MRCA is fitted with an advanced and flexible avionics system to facilitate navigation and otherwise undertake missions in bad weather and, if necessary, in spite of damage to the aircraft and its equipment.

Details

Aircraft Engineering and Aerospace Technology, vol. 46 no. 5
Type: Research Article
ISSN: 0002-2667

Content available
Article

T. Mahalingam and M. Subramoniam

Surveillance is the emerging concept in the current technology, as it plays a vital role in monitoring keen activities at the nooks and corner of the world. Among which…

Abstract

Surveillance is the emerging concept in the current technology, as it plays a vital role in monitoring keen activities at the nooks and corner of the world. Among which moving object identifying and tracking by means of computer vision techniques is the major part in surveillance. If we consider moving object detection in video analysis is the initial step among the various computer applications. The main drawbacks of the existing object tracking method is a time-consuming approach if the video contains a high volume of information. There arise certain issues in choosing the optimum tracking technique for this huge volume of data. Further, the situation becomes worse when the tracked object varies orientation over time and also it is difficult to predict multiple objects at the same time. In order to overcome these issues here, we have intended to propose an effective method for object detection and movement tracking. In this paper, we proposed robust video object detection and tracking technique. The proposed technique is divided into three phases namely detection phase, tracking phase and evaluation phase in which detection phase contains Foreground segmentation and Noise reduction. Mixture of Adaptive Gaussian (MoAG) model is proposed to achieve the efficient foreground segmentation. In addition to it the fuzzy morphological filter model is implemented for removing the noise present in the foreground segmented frames. Moving object tracking is achieved by the blob detection which comes under tracking phase. Finally, the evaluation phase has feature extraction and classification. Texture based and quality based features are extracted from the processed frames which is given for classification. For classification we are using J48 ie, decision tree based classifier. The performance of the proposed technique is analyzed with existing techniques k-NN and MLP in terms of precision, recall, f-measure and ROC.

Details

Applied Computing and Informatics, vol. 1 no. 1
Type: Research Article
ISSN: 2634-1964

Keywords

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Article

Details of Electrical and Electronic Apparatus with Applications in the Maintenance and Operation of Aircraft, Missiles and Space Vehicles. Details of a completely new…

Abstract

Details of Electrical and Electronic Apparatus with Applications in the Maintenance and Operation of Aircraft, Missiles and Space Vehicles. Details of a completely new, solid state, miniature vidicon television camera channel have been announced by the Closed Circuit Television Division of the Marconi Company. This 321 Scries camera channel has been specifically designed for the highly specialized requirements of aircraft, marine, military and heavy industrial applications where there is a growing need for a fully automatic equipment able to give extremely reliable operation under the most arduous environmental conditions and to withstand considerable vibration and mechanical shock in normal operation.

Details

Aircraft Engineering and Aerospace Technology, vol. 35 no. 10
Type: Research Article
ISSN: 0002-2667

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Article

Shujing Zhang, Manyu Zhang, Yujie Cui, Xingyue Liu, Bo He and Jiaxing Chen

This paper aims to propose a fast machine compression scheme, which can solve the problem of low-bandwidth transmission for underwater images.

Abstract

Purpose

This paper aims to propose a fast machine compression scheme, which can solve the problem of low-bandwidth transmission for underwater images.

Design/methodology/approach

This fast machine compression scheme mainly consists of three stages. Firstly, raw images are fed into the image pre-processing module, which is specially designed for underwater color images. Secondly, a divide-and-conquer (D&C) image compression framework is developed to divide the problem of image compression into a manageable size. And extreme learning machine (ELM) is introduced to substitute for principal component analysis (PCA), which is a traditional transform-based lossy compression algorithm. The execution time of ELM is very short, thus the authors can compress the images at a much faster speed. Finally, underwater color images can be recovered from the compressed images.

Findings

Experiment results show that the proposed scheme can not only compress the images at a much faster speed but also maintain the acceptable perceptual quality of reconstructed images.

Originality/value

This paper proposes a fast machine compression scheme, which combines the traditional PCA compression algorithm with the ELM algorithm. Moreover, a pre-processing module and a D&C image compression framework are specially designed for underwater images.

Details

Sensor Review, vol. 39 no. 4
Type: Research Article
ISSN: 0260-2288

Keywords

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Article

Vinod Daniel

Investigates conservation problems facing cultural collections in libraries and museums. Provides recommended levels of environmental control and a suggested risk…

Abstract

Investigates conservation problems facing cultural collections in libraries and museums. Provides recommended levels of environmental control and a suggested risk assessment of collections. Concludes that conserving items may not be possible for small museums.

Details

Library Review, vol. 50 no. 7/8
Type: Research Article
ISSN: 0024-2535

Keywords

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Article

Let's get this pornography thing straight—or as straight as one can in such a sensitive field. Like most people (I shan't say normal people because I don't want to get…

Abstract

Let's get this pornography thing straight—or as straight as one can in such a sensitive field. Like most people (I shan't say normal people because I don't want to get involved in a semantic/psychoanalytic discussion on what is normal) I find it boring in the extreme and, more often than not, distasteful. I don't read it by choice, only occasionally as a professional obligation, and, although this will undoubtedly offend the libertarians of the left and of the underworld press (of whom more later), I think there must be some prohibition on its publication—although to be honest I'm not sure where the line is to be drawn and how you should enforce it. So we're in trouble. It's a problem— complex, emotional and often plagued by irrational considerations. But one thing I'm sure of—the collective efforts of the self‐selected unctuous do‐gooders—no matter how well intentioned some of them may be—will not allay the fears of the ordinary citizenry, and will either end in complete and abject failure, or lead to some statutory restriction of individual liberty. The odd thing is that no one really wants either of these.

Details

New Library World, vol. 73 no. 2
Type: Research Article
ISSN: 0307-4803

Abstract

Details

Circuit World, vol. 39 no. 3
Type: Research Article
ISSN: 0305-6120

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