Fast Algorithm for Inverse Two-Dimensional S Transform and Its Application in Time-Frequency Filtering for SAR Image Despeckling

S transform is a time-frequency representation which has been applied in various fields, yet suffers the problem of time and resource consumption. In order to overcome this problem and facilitate its application in image analysis, we introduce a fast algorithm for inverse twodimensional S transform....

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Bibliographic Details
Published in:Chinese Journal of Electronics 2016, Vol.25 (1), p.100-105
Main Authors: Gao, Fei, Zhang, Ye, Wang, Jun, Sun, Jinping
Format: Article
Language:English
Subjects:
Fast algorithm
image analysis
inverse transforms
inverse two‐dimensional S transform
radar imaging
SAR image despeckling
SAR图像
Speckle noise reduction
synthetic aperture radar
Synthetic aperture radar (SAR) image
synthetic aperture radar image despeckling
S变换
time‐frequency analysis
Time‐frequency filter
time‐frequency filtering
Time‐frequency representation
Two‐dimensional S transform
二维
应用
快速算法
时间频率
时频滤波
相干斑抑制
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Description
Summary:S transform is a time-frequency representation which has been applied in various fields, yet suffers the problem of time and resource consumption. In order to overcome this problem and facilitate its application in image analysis, we introduce a fast algorithm for inverse twodimensional S transform. A two-dimensional S transform time-frequency filter for Synthetic aperture radar（SAR）image despeckling is proposed on the basis of this fast algorithm. Synthetic and actual SAR images are both used to quantitatively evaluate its performance. The proposed algorithm is compared with several classical algorithms with better results both in speckle noise reduction and detail preservation.
ISSN:1022-4653
2075-5597
DOI:10.1049/cje.2016.01.016