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Bilgisayar Mühendisliği Bölümü

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    Citation Count: Nar, F., Özgür,A., Saran, A.N. (2016). Sparsity-driven change detection in multitemporal sar images. IEEE Geoscience And Remote Sensing Letters, 13(7), 1032-1036. http://dx.doi.org/10.1109/LGRS.2016.2562032
    Sparsity-driven change detection in multitemporal sar images
    (IEE-INST Electrical Electronics Engineers Inc., 2016) Nar, Fatih; Özgür, Atilla; Saran, Ayşe Nurdan; 252953; 20868
    In this letter, a method for detecting changes in multitemporal synthetic aperture radar (SAR) images by minimizing a novel cost function is proposed. This cost function is constructed with log-ratio-based data fidelity terms and an l(1)-norm-based total variation (TV) regularization term. Log-ratio terms model the changes between the two SAR images where the TV regularization term imposes smoothness on these changes in a sparse manner such that fine details are extracted while effects like speckle noise are reduced. The proposed method, sparsity-driven change detection (SDCD), employs accurate approximation techniques for the minimization of the cost function since data fidelity terms are not convex and the employed l(1)-norm TV regularization term is not differentiable. The performance of the SDCD is shown on real-world SAR images obtained from various SAR sensors.