The paper deals with the transformation of an interpretation key, established for a visual interpretation, into a rule base applied for automated image analysis. An object-based approach is used for that purpose. The methodology is demonstrated for the detection of coca fields on medium resolution satellite imagery. The monitoring of illicit coca cultivation in Colombia is currently based on a ...

The utility of satellite imagery for landslide detection in southwest coastal British Columbia was evaluated by interpretation of orbital imagery (SPOT, IKONOS, and QUICKBIRD) and comparison with large-and medium-scale aerial photography. Satellite imagery was enhanced by simple, repeatable digital image processing techniques (contrast stretches and transformations, merging of images of differe...

On October 29, 2008, magnitude 6.4 earthquake occurred in a area of western Pakistan. One of the Japanese earth observation satellite, Advanced Land Observing Satellite (ALOS), observed this area by all onboard sensors, AVNIR-2, PRISM, and PALSAR. By optical imagery, AVNIR-2 and PRISM imagery, huge landslide (rock slide) and landslide dam were confirmed by visual interpretation. And also this l...

Sahara is a WEU funded project. Its aim is to show the potential usefulness of image interpretation techniques to help photo-interpreters. Typically, this could include drawing a sketch of the airport, looking for changes with respect to a reference geographic database, etc. The need for tools that fasten satellite imagery interpretation will become even more stringent with the next generation ...

Merging of different data sets is often used in digital image processing to improve the visual and analytical quality of the data. The analyst may need to merge different types of data. In this process, different data such as satellite imagery from the same sensor but with different resolution, satellite imagery from different sensors with varying resolution, digitized aerial photography and sa...

To date, prevention of natural disasters is only rarely achieved, and such events continue to pose an increasing threat to life and property. Especially following earthquakes, there is a need for rapid, accurate and reliable damage information in the critical postevent hours. Remote sensing technology can provide valuable information for response activities due to potentially high spatialtempor...

Panchromatic (PAN) satellite imagery has been used successfully in different applications such as topographic mapping and terrain modelling. Nevertheless, PAN imagery is still one of the less used digital sources for land-change studies except few processes where the high-resolution of the PAN images is used to improve the visualization quality of the multi-spectral images. This research aimed ...