A novel speckle reduction algorithm based on multiwavelet theory for SAR imagery

Inhalt:
A new speckle reduction algorithm based on multiwavelet transform is presented. The subband decomposition is performed using multiwavelet transform. The SAR image is decomposed using multiwavelet transform and a threshold value is estimated according to noise variance in each subband and soft thresholding operation is applied on the non-edge regions of the subband images. The despeckled image is obtained from the thresholded subband images using the inverse multiwavelet transform. Results show that the proposed method has better noise removal capacity than the scalar wavelet transform based methods.