Now showing items 1-9 of 9

    • Autofocused spotlight SAR image reconstruction of off-grid sparse scenes 

      Camlıca, S.; Gurbuz, A. C.; Arıkan, Orhan (Institute of Electrical and Electronics Engineers Inc., 2017)
      Synthetic aperture radar (SAR) has significant role in remote sensing. Phase errors due to uncompensated platform motion, measurement model mismatch, and measurement noise can cause degradations in SAR image reconstruction. ...
    • Man-made object classification in SAR images using 2-D cepstrum 

      Eryildirim, A.; Çetin, A. Enis (IEEE, 2009-05)
      In this paper, a novel descriptive feature parameter extraction method from Synthetic Aperture Radar (SAR) images is proposed. The new method is based on the two-dimensional (2-D) real cepstrum. This novel 2-D cepstrum ...
    • Off-grid sparse SAR image reconstruction by EMMP algorithm 

      Uğur, Salih; Arıkan, Orhan; Gurbuz, A.C. (IEEE, 2013)
      A new and robust sparse SAR image reconstruction technique is proposed for off-grid targets in the CS framework. In the proposed approach, basis vectors corresponding to on-grid point reflectors are perturbed on a finer ...
    • A particle swarm optimization based SAR motion compensation algorithm for target image reconstruction 

      Uğur, Salih; Arıkan, Orhan (IEEE, 2010)
      A new SAR motion compensation algorithm is proposed for robust reconstruction of target images even under large deviations of the platform from intended flight path. Phase error due to flight path deviations is estimated ...
    • SAR image reconstruction and autofocus by compressed sensing 

      Ugur, S.; Arıkan, Orhan (Elsevier, 2012-07-24)
      A new SAR signal processing technique based on compressed sensing is proposed for autofocused image reconstruction on subsampled raw SAR data. It is shown that, if the residual phase error after INS/GPS corrected platform ...
    • SAR image reconstruction by expectation maximization based matching pursuit 

      Ugur, S.; Arıkan, Orhan; Gürbüz, A. C. (Academic Press, 2015)
      Synthetic Aperture Radar (SAR) provides high resolution images of terrain and target reflectivity. SAR systems are indispensable in many remote sensing applications. Phase errors due to uncompensated platform motion degrade ...
    • A synthetic aperture imaging system using surface wave modes 

      Bozkurt, Ayhan; Arıkan, Orhan; Atalar, Abdullah (IEEE, 1995)
      A synthetic aperture acoustic imaging system with a novel inversion algorithm is described. Data is obtained by using a transducer insonifying the sample surface at a critical angle which is excited by a short electrical ...
    • Target detection and classification in SAR images using region covariance and co-difference 

      Duman, Kaan; Eryıldırım, Abdulkadir; Çetin, A. Enis (SPIE, 2009-04)
      In this paper, a novel descriptive feature parameter extraction method from synthetic aperture radar (SAR) images is proposed. The new approach is based on region covariance (RC) method which involves the computation of a ...
    • Target detection in SAR images using codifference and directional filters 

      Duman, Kaan; Çetin, A. Enis (SPIE, 2010)
      Target detection in SAR images using region covariance (RC) and codifference methods is shown to be accurate despite the high computational cost. The proposed method uses directional filters in order to decrease the search ...