Open AccessFast Algorithm for Inverse Two‐Dimensional S Transform and Its Application in Time‐Frequency Filtering for SAR Image Despeckling
Author(s) -
Gao Fei,
Zhang Ye,
Wang Jun,
Sun Jinping
Publication year - 2016
Publication title -
chinese journal of electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.267
H-Index - 25
eISSN - 2075-5597
pISSN - 1022-4653
DOI - 10.1049/cje.2016.01.016
Subject(s) - inverse , image (mathematics) , algorithm , computer science , artificial intelligence , mathematics , pattern recognition (psychology) , computer vision , geometry
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.