光学学报, 2020, 40 (8): 0810001, 网络出版: 2020-04-13
基于局部异常因子的近地全天时星图小波去噪 下载: 969次
Wavelet Denoising of Near-Earth All-Day Star Map Based on Local Outlier Factor
图 & 表
图 2. 对图1 作二维小波变换后的第3层水平高频系数
Fig. 2. Horizontal high frequency coefficient in third level after 2D wavelet transform to Fig. 1
图 3. 对局部星图作二维小波变换后的高频和低频系数。(a)水平高频系数;(b)垂直高频系数;(c)对角线高频系数;(d)低频系数
Fig. 3. High frequency and low frequency coefficients after 2D wavelet transform to the experimental star map. (a) Horizontal high frequency coefficient; (b) vertical high frequency coefficient; (c) diagonal high frequency coefficient; (d) low frequency coefficient
图 4. 拟合作差得到的高频和低频系数。(a)水平高频系数;(b)垂直高频系数;(c)对角线高频系数;(d)低频系数
Fig. 4. High frequency and low frequency coefficients obtained by fitting and subtracting. (a) Horizontal high frequency coefficient; (b) vertical high frequency coefficient; (c) diagonal high frequency coefficient; (d) low frequency coefficient
表 1星图的各去噪方法结果数据
Table1. Result data of each denoising method of star map
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吴强, 张锐. 基于局部异常因子的近地全天时星图小波去噪[J]. 光学学报, 2020, 40(8): 0810001. Qiang Wu, Rui Zhang. Wavelet Denoising of Near-Earth All-Day Star Map Based on Local Outlier Factor[J]. Acta Optica Sinica, 2020, 40(8): 0810001.