matlab_减少相干斑噪声，包含各种常见的滤波器如Lee滤波器，Frost滤波器等

# MATLAB-Speckle-reduction Spekle reduction of SAR images in matlab using different filters: -Mean filter. -Frost filter. -Modified frost filter(added thresholds). -Lee filter(Using Masks, ENL ect). Note these fitlers are developed without the use of loops to make them faster. For motivation or information of the filters, see: https://dtudk-my.sharepoint.com/:b:/g/personal/s154443_win_dtu_dk/EXSmZdvdXBNLjqZA4LytVYMByutyjZyiR4d0H7LDFp8rEw