关键词: SAR（合成孔径雷达） 乘性噪声 子波分析 多子波 边缘跟踪

Abstract: As a classic method in frequency domain, wavelet analysis begin with decomposing the SAR image, then get the low frequency coefficients which will be kept and soft or hard threshold is applied on the high ones, at last all of them are reconstructed. The n

Key words: SAR（synthetic aperture radar）, Multiplicative noise, Wavelet analysis, Multiwavelet, Edge track