Title :
Local texture stationarity indicator for filtering DoÑana wetlands SAR images
Author :
Marti-Cardona, Belen ; Lopez-Martinez, Carlos ; Dolz-Ripolles, Josep
Author_Institution :
Dept. of Hydraulic, Maritime & Environ. Eng., Univ. Politec. de Catalunya, Barcelona, Spain
Abstract :
This paper defines a new operator, named Ds, for local texture stationarity assessment on SAR images.. The aim is to discriminate heterogeneous targets from land cover types of high normalized variance values, as those observed in flooded vegetation areas of Doñana wetlands. Suitable Ds thresholds for such discrimination were estimated for different window sizes through Monte Carlo simulations of synthetic textures. Maximum stationary texture windows were then determined on Doñana ASAR scenes by Ds multi-resolution thresholding and averaging was applied within. Results reveal the substantial degree of smoothing achieved over high variance cover types, while edges among different targets were properly preserved.
Keywords :
floods; geophysical image processing; hydrological techniques; radar imaging; synthetic aperture radar; Donana ASAR scenes; Donana wetlands SAR images; Ds multiresolution thresholding; Monte Carlo simulations; flooded vegetation; heterogeneous targets; high normalized variance values; land cover; local texture stationarity assessment; local texture stationarity indicator; maximum stationary texture windows; suitable Ds thresholds; synthetic textures; Filtering; Fluctuations; Image edge detection; Noise; Speckle; Synthetic aperture radar; Vegetation mapping; SAR; Texture stationarity; multi-resolution filtering; wetlands;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International
Conference_Location :
Munich
Print_ISBN :
978-1-4673-1160-1
Electronic_ISBN :
2153-6996
DOI :
10.1109/IGARSS.2012.6352513