Scattering Identification in ISAR images

What is it about?

In this work different scattering mechanism, namely point scatteres and air intakes of jet engines, in ISAR images are separated. For this separation a model of air intakes, which can be distinguished from point scatteres, is necessary. For this model, air intakes are modelled as waveguides and thus the range extended returns are explained by the dispersion effects occuring in waveguides. The algorithm itself is a sparse decomposition algorithm that exploits an overcomplete dictionary composed of a point scatterer dictionary and a waveguide scattering dictionary.

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Why is it important?

This work is an example for model-based decomposition of ISAR images that uses a physically motivated model. Publications before used dictionaries, which are known from image processing, for example Wavelets. Further shows it the strong influence of the jet engines on the resulting ISAR image.