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Spatial relations and spatial reasoning for the interpretation of Earth observation images using a structural model.

Abstract : High resolution remote sensing images allow discriminating between different objects that compose a scene. However, due to the large quantities of information it is difficult to differentiate the meaningful characteristics or regions necessaries for the description of the scene. Thus, the interpretation of these image requires the introduction of new tools which allows us to distinguish the objects of interest from the rest of the image. First we study the spatial relations which can be useful for the interpretation of satellite images. We focused on the following spatial relations: surround, relations between linear objects and regions, alignment and parallelism. For each of these relations we developed formal models within the fuzzy set framework, which take into account the semantics, the perception and the context of use of these relations. These relations were evaluated on real objects, obtaining satisfaction degrees which fit well with the intuition, even in the case of complex objects. Then we propose an application of spatial relations for higher level tasks. We introduce an interpretation system which is capable of finding the instantiations of an structural model in an image. The interpretation problem is described as a flexible constraint satisfaction problem. We proposed adapted propagation algorithms for flexible constraint satisfaction problems in order to cope with complex relations and to take into account the difficulties of properly detecting the objects in the image. We tested our algorithm in scenes containing harbors and airports and the results show the interest of incorporating this methodology in a more complete image interpretation system.
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https://pastel.archives-ouvertes.fr/pastel-00583410
Contributor : Carolina Vanegas <>
Submitted on : Tuesday, April 5, 2011 - 3:51:57 PM
Last modification on : Friday, July 31, 2020 - 10:44:07 AM
Long-term archiving on: : Sunday, December 4, 2016 - 3:49:15 AM

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  • HAL Id : pastel-00583410, version 1

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Maria Carolina Vanegas Orozco. Spatial relations and spatial reasoning for the interpretation of Earth observation images using a structural model.. Signal and Image Processing. Télécom ParisTech, 2011. English. ⟨pastel-00583410⟩

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