Title :
Evaluation of SAR-SDNLM filter for change detection classification
Author :
Reis, Mariane S. ; Torres, Leonardo ; Sant´Anna, Sidnei J. S. ; Freitas, Corina C. ; Dutra, Luciano V.
Author_Institution :
Image Process. Div. (DPI), Brazilian Nat. Inst. for Space Res. (INPE), São José dos Campos, Brazil
Abstract :
This study evaluates the usage of Stochastic Distances Nonlocal Means (SDNLM) speckle filter in an image from Brazilian Amazon. The objective is to evaluate whether the noise reduction improves land cover and change classification. Results obtained from filtered images were compared with those obtained from unfiltered images and images filtered using Gamma Map. Results shows that, when using region based Bhathacharyya Minimum Distance Classifier, land cover and change classification using both speckle filters has accuracy values statistically equal. Analyzing the filtered images themselves, SDNLM obtained better results in terms of visual quality and edges preservation.
Keywords :
edge detection; geophysical image processing; image classification; interference suppression; land cover; object detection; radar imaging; speckle; stochastic processes; synthetic aperture radar; Gamma map; SAR-SDNLM filter; change detection classification; edge preservation; filtered image analysis; image filtering; land cover classification; noise reduction; region based Bhathacharyya minimum distance classifier; speckle filters; stochastic distances non-local means; visual quality; Indexes; Optical filters; Optical sensors; Remote sensing; Speckle; Synthetic aperture radar; Change Detection; Land Cover Classification; SAR data; Speckle reduction;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2014 IEEE International
Conference_Location :
Quebec City, QC
DOI :
10.1109/IGARSS.2014.6946865