中国激光, 2019, 46 (9): 0906002, 网络出版: 2019-09-10
基于Armijo线搜索的布里渊散射谱图像降噪算法 下载: 913次
Brillouin Scattering Spectral Image Denoising Algorithm Based on Armijo Line Search
图 & 表
图 4. 不同λ下的降噪图像正视图。(a) λ=0;(b) λ=0.5;(c) λ=1
Fig. 4. Front views of noise reduction image with different λ. (a) λ=0; (b) λ=0.5; (c) λ=1
图 6. 常温和加温区域的BFS和λ关系曲线。(a)常温;(b)加温
Fig. 6. Relationship between BFS and λ in normal and heating temperature regions. (a) Normal temperature; (b) heating temperature
图 8. 降噪图像随迭代次数的变化。(a) n=0,α0=0.9124;(b) n=1,α1=0.2308;(c) n=2,α2=4.2215×10-21;(d) n=3,α3=4.2215×10-21
Fig. 8. Variation in noise reduction image with number of iterations. (a) n=0, α0=0.9124; (b) n=1, α1=0.2308; (c) n=2, α2=4.2215×10-21; (d) n=3, α3=4.2215×10-21
图 9. ‖un+1-un‖/‖un‖的值随迭代次数的变化
Fig. 9. Variation in value of ‖un+1-un‖/‖un‖ with number of iterations
图 11. 256次平均的三维布里渊散射谱TV降噪结果对比。(a)降噪前;(b)降噪后
Fig. 11. Comparison of TV noise reduction results of 256-time average 3D Brillouin scattering spectrum. (a) Before noise reduction; (b) after noise reduction
尚秋峰, 秦文婕, 胡雨婷. 基于Armijo线搜索的布里渊散射谱图像降噪算法[J]. 中国激光, 2019, 46(9): 0906002. Shang Qiufeng, Qin Wenjie, Hu Yuting. Brillouin Scattering Spectral Image Denoising Algorithm Based on Armijo Line Search[J]. Chinese Journal of Lasers, 2019, 46(9): 0906002.