This paper proposes a framework for automatic maritime visual surveillance using an unmanned water vehicle (UWV). The UWV is equipped with a GPS, an e-compass and a high resolution omni-camera. A fast algorithm is proposed to automatically calibrate the moving omni-camera in real time. Moreover, a saliency based visual attention method is used for target detection. Targets are tracked using ada...

International Journal of Geographical Information Science Publication details, including instructions for authors and subscription information: http://www.informaworld.com/smpp/title~content=t713599799 An integrated TIN and Grid method for constructing multi-resolution digital terrain models B. Yang ab; W. Shi c; Q. Li b a GIS Divison, Department of Geography, University of Zurich-Irchel, Zuric...

The processing of cloud free geo-referenced imagery is one of the preliminary processing step of any land application. This letter describe the methodology developed to obtain a seamless cloud free composite of Africa for 2016 using Sentinel-2A data at 10 meters resolution freely available from the European Space Agency. The method is based on an hybrid method resulting from the merging of the ...

Considering the increasing demand for developing alternative construction materials, due to the growing environmental concerns, this paper discusses the feasibility of alkali activated geo-polymer concrete, as a future construction material. The main objective of this study involves observation of structural behaviours of the fresh fly ash-based geo-polymer concrete, understanding the basic mix...

In this paper, the concept of geo-referenced 3D map and its applications have been discussed. The major contribution is that it adopts geo-referenced images for various applications. Next generation 3D map, which is realistic, image-based, is able to provide 3D geometry measurements and various geo-location services. The methodology and development process has been introduced. Experiments for t...

We present a method for enhancing the visual quality of existing digital elevation models textured with orthophotos, using a sparse set of unordered, high resolution photographs. After an initial manual selection of correspondence points, we automatically register the input photographs to the given terrain data set using robust imagebased modeling techniques. To combine the geo-registered image...

The launch of Ikonos satellite at the end of September 1999 marked the beginning of a new era for the application of satellite images. Being able to provide up to one-metre resolution panchromatic and four-metre resolution multispectral images, thus available in the past for military purposes or from aerial surveys only, this satellite offers considerable improvements and broadens the applicati...

The amount and availability of high-quality geo-spatial image data, such as digital satellite and aerial photographs, is increasing dramatically. Task-based management of such visual information and associated knowledge is a central concern for organisations that rely on digital imagery. We are developing geo-spatial knowledge management techniques that employ case-based reasoning as the core m...

Despite laser scan 3D point cloud acquisition has greatly improved over the next few years, the process of creating 3D large scale city models is still quite expensive and not straightforward. At the same time, nowadays services such as Google Street View provide a vast amount of geo-registered panoramic imagery, guaranteeing a decent resolution for dense locations at zero cost. Our idea is ind...