Acta Optica Sinica, Volume. 41, Issue 9, 0910001(2021)
Extraction Method of Water Surface Weak Texture Based on Improved Curvelet Transformation
Fig. 1. Illustration of frequency domain segmentation for curvelet transformation
Fig. 2. Simulation results of weak texture signal images of submarine's V-wake in direct course. (a) Weak texture image in Ref. [7]; (b) weak texture image in Ref. [8]; (c) weak texture image in Ref. [15]; (d) weak texture image in Ref. [16]; (e) weak texture image in Ref. [7] with background; (f) weak texture image in Ref. [8] with background; (g) weak texture image in Ref. [15] with background; (h) weak texture image in Ref. [16] with background
Fig. 3. Contrast and average of grayscale of V-shape wake
Fig. 4. Directional component screening for V-shape wake. (a) Directional component sizer in frequency domain; (b) weak texture after directional component screening
Fig. 5. Optimized threshold screening for V-shaped wake
Fig. 6. Edge extraction of gradient operator for V-shaped wake
Fig. 7. Flowchart of algorithm
Fig. 8. Different V-shaped wakes and edge extraction results of different algorithms. (a) Model in Ref. [7] added with background; (b) result of proposed algorithm for
Fig. 9. Algorithm adaptability of texture contrast
Fig. 10. Algorithm adaptability of a priori frequency screening direction
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Xiangxiang Zhang, Yonghe Chen, Yutian Fu. Extraction Method of Water Surface Weak Texture Based on Improved Curvelet Transformation[J]. Acta Optica Sinica, 2021, 41(9): 0910001
Category: Image Processing
Received: Oct. 19, 2020
Accepted: Nov. 27, 2020
Published Online: May. 10, 2021
The Author Email: Fu Yutian (yutianfu@mail.sitp.ac.cn)