Determinants of the Price of High-Tech Metals: An Event Study     

Markus Wanner  Tobias Gaugler  Benedikt Gleich  Andreas Rathgeber 《Natural Resources Research》2015,24(2):139-159

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Despeckling of TerraSAR-X Data Using Second-Generation Wavelets   总被引：1，自引：0，他引：1  

Gleich  D. Kseneman  M. Datcu  M. 《Geoscience and Remote Sensing Letters, IEEE》2010,7(1):68-72

This letter presents the despeckling of synthetic aperture radar (SAR) images within the bandelet and contourlet domains. A model-based approach is presented for the despeckling of SAR images. The speckle-reduced estimate is found using the first-order Bayesian inference, and the best model's parameters are estimated using the second-order Bayesian inference. Synthetic and real images are used for evaluating the qualities of the despeckling methods. The experimental results showed that the combination of Bayesian inference and bandelet transform outperforms the contourlet-based despeckling algorithm using synthetic data and objective measurements.   相似文献   

Huber–Markov Model for Complex SAR Image Restoration     

Soccorsi  M. Gleich  D. Datcu  M. 《Geoscience and Remote Sensing Letters, IEEE》2010,7(1):63-67

This letter presents the despeckling of single-look complex (SLC) synthetic aperture radar (SAR) images using nonquadratic regularization. The objective function consists of an image model, a gradient, and a prior model. The Huber–Markov random field (HMRF) models the prior. A numerical solution is achieved through extensions of half-quadratic regularization methods using complex-valued SAR data. The proposed method using the HMRF prior together with nonquadratic regularization shows the superior results on SLC synthetic and actual SAR images.   相似文献   

Fuzzy-coded space-frequency quantization for SAR data compression     

Gleich  D. Gergic  B. Cucej  Z. Planinsic  P. 《Geoscience and Remote Sensing Letters, IEEE》2004,1(2):90-93

In this letter, we propose a new image coding technique, which is a combination of space frequency quantization and a context-based modeling using fuzzy logic. The compression results showed that the proposed coder outperforms the state-of-the-art coders in the rate-distortion sense for compression of processed synthetic aperture radar amplitude data.  相似文献