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Section: Scientific Foundations

Keywords : change detection, image assimilation, inverse problem, monitoring, motion, matching, tracking, remote sensing.

Environmental images and data processing

The overall objective is the extraction of dynamic information from sequences of images -and notably satellite images-, for provision to environmental forecast or monitoring systems. Information extraction must satisfy the following constraints:

The dynamic information to be extracted can be classified into two main groups:

The effective use of the extracted information by environmental models arises the general problem of image assimilation. Most of existing approaches are restricted to the assimilation of images, considered as a collection of individual measurements, directly related to state variables. The challenge is the design of methods for assimilating the structured information contained in image data and sequences. This requires tackling the following issues:


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