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Smart camera networks usually have limited resources. This includes not only processing power and memory but in many applications also the amount of available energy. To find a trade-off between available resources and the current requirements of the application, the configuration of the network is very important. Due to rapid changes in the visual sensor(More)
—A visual sensor network (VSN) consists of a large amount of camera nodes which are able to process the captured image data locally and to extract the relevant information. The tight resource limitations in these networks of embedded sensors and processors represent a major challenge for the application development. In this paper we focus on finding optimal(More)
This paper presents a real-time complex event detection concept for resource-limited multimedia sensor networks. A comprehensive solution based on Answer Set Programming (ASP) is developed. We show that ASP is an appropriate solution to detect a large number of simple and complex events (video-audio understanding) on platforms with limited resources e.g.(More)
Advances in sensors, networking and embedded computing have driven a paradigm shift in the control of camera networks. The processing of the image data has migrated from central servers to the camera network following fully distributed or clustered approach. In clustering, the data is analyzed within a group of cameras, and the abstracted data is then(More)
A recent trend in smart camera networks is that they are able to modify the functionality during runtime to better reflect changes in the observed scenes and in the specified monitoring tasks. In this paper we focus on different configuration methods for such networks. A configuration is given by three components: (i) a description of the camera nodes, (ii)(More)
This paper presents a smart resource-aware multimedia sensor network. We illustrate a surveillance system which supports human operators, by automatically detecting the complex events and giving the possibility to recall the detected events and searching them in an intelligent search engine. Four subsystems have been implemented, the tracking and detection(More)
—A visual sensor network (VSN) consists of resource-limited camera nodes which process the captured image data locally and collaborate with other cameras over a wireless network. The configuration of the network is a very important task in VSNs in order to adapt the available resources to the current requirements of the application. We focus on coverage and(More)
Despite significant interest in the research community, the development of multi-camera applications is still quite challenging. This paper presents Ella - a dedicated publish/subscribe middleware system that facilitates distribution, component reuse and communication for heterogeneous multi-camera applications. We present the key components of this(More)
While the topic of security in industrial applications has gained some momentum in recent years, there are still severe security vulnerabilities which are actively exploited for attacks. The robot operating system (ROS) is expected to further grow in usage and to be used in many industrial applications. Analysis, however, shows that it lacks several(More)