Theodoros Alexandropoulos

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Recent development in the aspects of low-level image processing for feature extraction, as well as in the standardization of description schemes for video description, provide means for the development of intelligent transportation systems. ITS may support a wide range of abilities, including vehicle identification and reidentification, event detection and(More)
Identification of vehicles for security reasons has lately attracted much scientific and commercial attention. In certain areas, such as government buildings, army camps or country borders, the vehicles are inspected before allowed to enter. As this inspection needs to be thorough, it is a rather time-consuming process. To address this issue, this paper(More)
The performance of template-based inspection of randomly oriented targets relies on the effective operation of two procedures: image registration and change detection. Each procedure is characterised by its own challenges. Real-time applications require that image registration is performed in an acceptable time with accurate results, regardless of(More)
The task of detecting changes between two image frames is obstructed by the influence of noise and by the existence of ambient illumination variations between the image frames. The former is an inherent property of all electronic imaging devices. The latter appears when changes in camera exposure or white balance settings occur and tends to degrade the(More)
This paper presents a template-based inspection application for change detection. This implementation aims to the inspection of targets which appear at an arbitrary orientation, such as undervehicle surfaces in vehicle inspection stations. The operation of the application is divided in two phases: image registration and change detection. Image registration(More)
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