Laser & Optoelectronics Progress, Volume. 58, Issue 14, 1412004(2021)
Speckle Area Extraction Based on Weighted Entropy of Laplacian Pyramid
Fig. 1. Gray distributions of different areas. (a) Background area; (b) speckle area
Fig. 2. Gaussian pyramid and Laplacian pyramid
Fig. 3. Comparison of original image and Laplacian pyramid image. (a) Original image; (b) LP0 image
Fig. 4. Speckle area extraction based on second-order gradient entropy and Laplacian pyramid weighted entropy. (a) Extraction result based on second-order gradient entropy; (b) entropy value distribution histogram of second-order gradient entropy; (c) extraction result based on weighted entropy; (d) entropy value distribution histogram of weighted entropy
Fig. 5. Flow chart of speckle area extraction algorithm
Fig. 6. Original image 1 and comparison of extraction results of two methods. (a) Original image 1; (b) extraction result based on second-order gradient entropy; (c) extraction result based on weighted entropy
Fig. 7. Original image 2 and comparison of extraction results of two methods. (a) Original image 2; (b) extraction result based on second-order gradient entropy; (c) extraction result based on weighted entropy
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Yuqiao Yang, Kun Ma, Yue Yuan, Houchuang Chen, Yuxuan Xue. Speckle Area Extraction Based on Weighted Entropy of Laplacian Pyramid[J]. Laser & Optoelectronics Progress, 2021, 58(14): 1412004
Category: Instrumentation, Measurement and Metrology
Received: Oct. 30, 2020
Accepted: Nov. 18, 2020
Published Online: Jul. 8, 2021
The Author Email: Ma Kun (453937936@qq.com)