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      • Department of Computer Engineering
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      Sıkıştırılmış algılama kullanılarak nokta kipli SAR görüntü oluşturulması

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      Author
      Uǧur, Salih
      Arıkan, Orhan
      Date
      2011-04
      Source Title
      IEEE 19th Signal Processing and Communications Applications Conference, SIU 2011
      Pages
      146 - 149
      Language
      Turkish
      Type
      Conference Paper
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      Abstract
      Bu çalışmada SAR gorüntü oluşturma yöntemi olarak sıkıştırılmış algılama tekniklerinden birisi olan LASSO kısıtlı en iyileştirme yaklaşımı kullanılmıştır. LASSO kapsamında kullanılan kısıt parametresi 𝜏 ’nun SAR görüntüsüne etkisini araştırmak amacı ile gerçek SAR görüntüleri üzerinde incelemeler yapılmıştır. Elde edilen görüntüler karşılaştırılmıştır. Seyreklik kısıt parametresi 𝜏 ’nun gürbüz seçimi için sinyal gürültü oranı ve ilintiye dayalı yeni bir metrik önerilmiştir. In this work, LASSO formulation, which is one of the comppessed sensing techniques, is used as a method of SAR image reconstruction. Simulations on the real SAR images are performed in order to analyze the effect of the τ parameter in LASSO formulation to the formed SAR imagery. Formed images are compared. A parameter, derived from signal to noise ratio and cross correlation, is suggested to robustly select the sparsity limit parameter τ. © 2011 IEEE.
      Keywords
      Compressed sensing
      Cross correlations
      Limit parameters
      SAR imagery
      SAR Images
      Sensing techniques
      Spotlight mode
      Sensors
      Signal processing
      Signal to noise ratio
      Image reconstruction
      Permalink
      http://hdl.handle.net/11693/28384
      Published Version (Please cite this version)
      https://doi.org/10.1109/SIU.2011.5929608
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      • Department of Computer Engineering 1368
      • Department of Electrical and Electronics Engineering 3524
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