Abstract
Speckle suppression in synthetic aperture radar (SAR) image is one of the important steps in SAR image processing, in which spatial domain based algorithm has been widely used. However, such filtering algorithm does not consider the local orientation information and could not preserve the edge details well. To solve the problem, an improved frost filtering algorithm based on the four rectangular windows is presented. An edge strength maps (ESM) of the four rectangular windows is introduced into the frost filtering algorithm, to keep the proposed algorithm adaptively to match the local geometric structure of the multiplicative model. Meanwhile,the weight of each pixel near the edge local window is calculated. This algorithm could solve the problem of direction deficiency in variation coefficient, and preserve the edge details well. The experimental results show that the proposed algorithm has better results on speckle suppression and edge preservation than some existing algorithms.
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Zhang, X., Shi, X., Zhang, M., Li, L. (2020). An Improved Frost Filtering Algorithm Based on the Four Rectangular Windows. In: Liang, Q., Wang, W., Liu, X., Na, Z., Jia, M., Zhang, B. (eds) Communications, Signal Processing, and Systems. CSPS 2019. Lecture Notes in Electrical Engineering, vol 571. Springer, Singapore. https://doi.org/10.1007/978-981-13-9409-6_299
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DOI: https://doi.org/10.1007/978-981-13-9409-6_299
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