Nonhomogeneous Noise Removal From Side-Scan Sonar Images Using Structural Sparsity
- Authors
- Jin, Youngsaeng; Ku, Bonhwa; Ahn, Jaekyun; Kim, Seongil; Ko, Hanseok
- Issue Date
- 8월-2019
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Compressive sensing (CS); image denoising; nonhomogeneous noise; side-scan sonar (SSS); structural sparsity
- Citation
- IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, v.16, no.8, pp.1215 - 1219
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
- Volume
- 16
- Number
- 8
- Start Page
- 1215
- End Page
- 1219
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/63633
- DOI
- 10.1109/LGRS.2019.2895843
- ISSN
- 1545-598X
- Abstract
- The image quality of side-scan sonar (SSS) is determined by its operating frequency. SSS operating at a low frequency produces low-quality images due to high levels of noise. This noise is randomly generated from a number of different sources, including equipment noise and underwater environmental interference. In addition, to compensate for transmission loss in a received signal, the signal is amplified by time-varied gain correction, and consequently, SSS images contain nonhomogeneous noise, unlike natural images whose noise is assumed to he homogeneous. In this letter, a structural sparsity-based image denoising algorithm is proposed to remove nonhomogeneous noise from SSS images. The algorithm incorporates both local and nonlocal models in the structural features domain in order to guarantee sparsity and enhance nonlocal self-similarity. Using structural features also preserves fine-scale structures, leading to denoised images with natural seabed textures. The patch weights in the nonlocal model are corrected in consideration of the nonhomogeneity of the noise. Experimental results show that the proposed algorithm is qualitatively and quantitatively comparable to conventional algorithms.
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