In this letter, a fast and robust optical-flow estimation algorithm is investigated for synthetic aperture radar (SAR) images' coregistration. The principle of the initial algorithm is described, as well as its adaptation to the case of radar images. A performance evaluation method is proposed to fix the choice of the parameters of the algorithm. Promising results in change detection or interferometry between SAR images of different resolutions are presented. They offer the opportunity to use this kind of algorithm in the case of high-resolution images containing many structural elements as in urban areas.
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Plyer et al. (2015) studied this question.
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