Despeckling algorithm for reducing speckle noise in images generated from active sensors
- Authors
- Choi, Hyunho; Jeong, Jechang
- Issue Date
- Aug-2020
- Publisher
- INST ENGINEERING TECHNOLOGY-IET
- Keywords
- synthetic aperture radar; speckle; radar imaging; image filtering; image denoising; geophysical image processing; edge detection; synthetic aperture radar images; active sensors; SAR image; imaging performance improvement; speckle-noise removal algorithm; multiplicative speckle noise; additive noise; weighted guided image filter; speckle noise suppression; edge preservation results; despeckling algorithm; speckle noise reduction; SAR images; computer vision; speckle reducing anisotropic diffusion filter; preprocessing filter; logarithmic transformation
- Citation
- ELECTRONICS LETTERS, v.56, no.17, pp.876 - 878
- Indexed
- SCIE
SCOPUS
- Journal Title
- ELECTRONICS LETTERS
- Volume
- 56
- Number
- 17
- Start Page
- 876
- End Page
- 878
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/2576
- DOI
- 10.1049/el.2020.0614
- ISSN
- 0013-5194
- Abstract
- Synthetic aperture radar (SAR) images can be utilised in various fields because they are not affected by the time of day or weather conditions. However, in the process of employing active sensors to obtain a SAR image, speckle noise is generated in the image. Speckle noise degrades the ability of computer vision to observe the Earth. To improve imaging performance, an algorithm for removing speckle noise is necessary. For this purpose, the authors propose a speckle-noise removal algorithm. A speckle reducing anisotropic diffusion filter is employed as a pre-processing filter, in which multiplicative speckle noise can be converted into additive noise using a logarithmic transformation. To remove the additive noise, they use a weighted guided image filter. Experimental results indicate that the proposed method exhibits improved speckle noise suppression and edge preservation results compared with those of existing methods.
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