Search results

How do engineers inspect the inside of a nuclear reactor? Laser scanning can turn it into a normal television picture.

The concept of software‐based camera control and stabilisation and test results for two degree‐of‐freedom onboard cameras are presented in this paper. Contrary to the conventional gimballed observation cameras, the presented solution makes lightweight gimbal's construction possible. The unmanned aircraft state measurements and information of the target position are used in the computation of the desired angles of the camera rotation axes. The method has been tested using simulation technique. The results obtained in this paper show the need for fast enough camera actuation to stabilise image when aircraft attitude is disturbed by turbulence and attitude changes as a manoeuvre effect. The quantitative relationship between the parameters of camera actuators and achievable pointing accuracy are shown for exemplary flight condition simulation test.

Previous articles in this series have mentioned some TV cameras costing £200 and others costing £2000 plus. The reader may well wonder at the difference in price.

In the context of fire incidents within buildings, efficient scene perception by firefighting robots is particularly crucial. Although individual sensors can provide specific types of data, achieving deep data correlation among multiple sensors poses challenges. To address this issue, this study aims to explore a fusion approach integrating thermal imaging cameras and LiDAR sensors to enhance the perception capabilities of firefighting robots in fire environments.

Prior to sensor fusion, accurate calibration of the sensors is essential. This paper proposes an extrinsic calibration method based on rigid body transformation. The collected data is optimized using the Ceres optimization algorithm to obtain precise calibration parameters. Building upon this calibration, a sensor fusion method based on coordinate projection transformation is proposed, enabling real-time mapping between images and point clouds. In addition, the effectiveness of the proposed fusion device data collection is validated in experimental smoke-filled fire environments.

The average reprojection error obtained by the extrinsic calibration method based on rigid body transformation is 1.02 pixels, indicating good accuracy. The fused data combines the advantages of thermal imaging cameras and LiDAR, overcoming the limitations of individual sensors.

This paper introduces an extrinsic calibration method based on rigid body transformation, along with a sensor fusion approach based on coordinate projection transformation. The effectiveness of this fusion strategy is validated in simulated fire environments.

We examine how the organizational identity of established firms affects their strategic outcomes during the emergence phase of a new market. Drawing on cognitive theories of analogical learning, we build theory about how the established identities of producers influence the fluency with which consumers make sense of novel products, and hence affect valuations. We illustrate this theory through an empirical study of consumer evaluations of de alio entrants during the emergence of the digital camera industry.

This chapter demonstrates that while in most late modern societies there is a neoliberal hegemony to expand police Closed-Circuit Television (CCTV) surveillance for crime control and antiterrorism, in Greece there is serious controversy and resistance against the post-Olympic use of more than 1,200 Olympic CCTV cameras. Drawing on the interesting politics of CCTV expansion and resistance, the chapter traces the reasons why, in the Greek context, this very expensive Olympic surveillance “dowry” has been opposed, even for traffic control. It critically attributes Greek citizens’ fear and mistrust primarily to their past police-state experience of authoritarian, thought-control surveillance.

The chapter aims to highlight developments in photography over the last two centuries, with an emphasis on the switch from analog to digital, and the emergence of Web 2.0 technologies, online photo management sites, and camera phones.

The chapter is a culmination of some of the key literature and research papers on photography, Web 2.0, Flickr, camera phones, and tagging, and is based on the author’s opinion and interpretation.

The chapter reports on how the switch from analog to digital has changed the methods for capturing, organizing, and sharing photographs. In addition, the emergence of Web 2.0 technologies and camera phones have begun to fundamentally change the way that people think about images and the kinds of things that people take photographs of.

The originality of the chapter lies in its predictions about the future direction of photography. The chapter will be of value to those interested in photography, and also to those responsible for the future development of photographic technology.

This chapter is about the politics of surveillance and more specifically about the politics of siting public closed circuit television (CCTV) systems within urban neighborhoods. Through an exploration of political contests waged around attempts by local police to install public surveillance systems in the City of Vancouver's Downtown Eastside and Granville Mall districts, we argue that the success of public surveillance proposals is hardly inevitable. Instead, a combination of local factors play vital roles in variously supporting or constraining such attempts. Although this present chapter can be read as providing a useful counterpoint to the dominance of accounts about such developments in Great Britain, where public CCTV is a routine fact of daily urban life, we conclude on a cautionary note: with the current proliferation of public and private forms of surveillance throughout urban spaces, surveillance analysts risk missing the forest for the trees if we only concentrate on the fate of one surveillance tool or tactic.

Thanks to the advancement of digital image technology, digital single-lens reflex cameras (DSLRs) have replaced film single-lens reflex cameras. This advancement is reflected in some core technologies of DSLRs such as digital image sensors and electronic shutter mechanisms, which have allowed taking photographs even under tough conditions. In a similar vein, mirrorless interchangeable-lens cameras (MILCs) are now threatening to disrupt the DSLR market. Disruptive technologies represent a major challenge in forecasting. This paper uses specifications of over a 100 DSLRs and MILCs from the six leading dominant brands: Canon, Nikon, Sony, Pentax, Panasonic, and Olympus, for the analysis.