联合双边滤波器和小波阈值收缩去噪算法研究

刘尚旺, 郜刘阳, 王博

Research on image denoising algorithm of joint bilateral filter and wavelet threshold shrinkage

Shangwang LIU, Liuyang GAO, Bo WANG

表2 不同椒盐噪声密度下各种算法的PSNR值

Tab.2 PSNR in different densities impulse noise(dB)

算法 图像编号 椒盐噪声密度 平均值 0.1 0.2 0.3 0.4 NLM ① 28.63 27.94 27.63 26.82 27.76 ② 26.72 25.58 24.62 23.45 25.09 ③ 26.53 25.43 24.54 23.21 24.93 ④ 26.85 25.71 24.81 23.62 25.25 ⑤ 25.48 24.68 23.43 22.89 24.12 ⑥ 25.64 24.20 22.85 22.03 23.68 BF ① 40.17 38.72 37.53 36.80 38.31 ② 37.28 36.67 35.73 34.21 35.97 ③ 31.34 29.47 28.64 27.32 29.19 ④ 35.73 33.63 32.71 33.43 33.88 ⑤ 33.58 31.57 30.46 29.38 31.25 ⑥ 29.97 27.51 26.37 25.26 27.28 小波阈值收缩 ① 18.79 16.54 14.71 13.23 15.82 ② 18.34 16.63 14.68 13.82 15.87 ③ 22.47 21.26 20.51 19.32 20.89 ④ 25.51 24.27 23.65 22.07 23.88 ⑤ 26.37 24.50 23.33 22.72 24.23 ⑥ 25.18 23.62 22.41 21.55 23.19 PDE ① 39.79 37.62 36.37 35.28 37.27 ② 38.67 36.37 35.40 34.39 36.21 ③ 38.21 35.33 34.58 33.42 35.39 ④ 38.72 36.51 35.49 34.41 36.28 ⑤ 38.84 36.63 35.38 34.32 36.29 ⑥ 39.20 36.47 35.35 34.20 36.31 本文算法 ① 45.42 42.65 40.07 38.83 41.74 ② 45.17 42.21 38.97 37.60 40.99 ③ 44.82 41.76 38.42 37.00 40.50 ④ 45.03 41.59 40.01 38.21 41.21 ⑤ 44.96 40.52 39.21 37.82 40.63 ⑥ 45.00 40.63 38.87 36.97 40.37