Improved anisotropic diffusion filtering for SAR image despeckling. Issue 10 (1st May 2013)

• Record Type: Journal Article
• Authors: Fabbrini, L.; Greco, M.; Messina, M.; Pinelli, G.
• Is Part Of: Electronics letters. Volume 49:Issue 10(2013)
• Page Start: 672
• Page End: 674
• Publication Date: 2013-05-01
• Subjects: filtering theory -- radar imaging -- synthetic aperture radar; anisotropic diffusion filtering -- SAR image despeckling -- synthetic aperture radar -- speckle noise -- salient information -- noise reduction -- nonlocal diffusion filters -- NLD filters -- Lena image -- Cosmo‐SkyMed -- CSK satellite constellation; filtering theory -- radar imaging -- synthetic aperture radar; anisotropic diffusion filtering -- SAR image despeckling -- synthetic aperture radar -- speckle noise -- salient information -- noise reduction -- nonlocal diffusion filters -- NLD filters -- Lena image -- Cosmo‐SkyMed -- CSK satellite constellation; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2012.3851
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : In synthetic aperture radar (SAR) images, the speckle noise often corrupts salient information that is of interest (e.g. textures, small hard targets, object boundaries, etc.). To tackle such an issue, proposed is a novel anisotropic diffusion filter that manages to simultaneously fulfil competing requirements: noise reduction on homogeneous regions, weak edges preservation, and keeping hard targets intact. The capabilities of the proposed filter were proved by comparing it with another two non‐linear diffusion filters applied on a Lena image corrupted by a multiplicative speckle noise and on a real SAR image acquired by the Cosmo‐SkyMed satellite constellation.