IDL实现3*3均值滤波和中值滤波

关于均值滤波和中值滤波

属于空域图像增强的处理方法，均值滤波去麻点，中值滤波保边缘。

实现代码

;Name: 3x3平均值滤波&中值滤波
;Time: 2013-12-19
;Author: 尹全超

PRO item_c_1
  
  ;读取图像
  file =  DIALOG_PICKFILE(/READ, FILTER = '*.bmp')
  binary_img = READ_BMP(file)
  img01 = image(binary_img,LAYOUT=[3,1,1],title='Original')
  
  ;获取行数和列数
  row=N_elements(binary_img[0,*])
  col=N_elements(binary_img[*,0])
  ave=binary_img
  mid=binary_img
  
  ;3x3平均值滤波&3x3中值滤波
  FOR i=1,row-2 DO BEGIN
    FOR j=1,col-2 DO BEGIN
      ave[j,i]=fix(mean(binary_img[j-1:j+1,i-1:i+1]))
      mid[j,i]=fix(median(binary_img[j-1:j+1,i-1:i+1]))
    ENDFOR
  ENDFOR
  
  img02 = image(ave,LAYOUT=[3,1,2],/CURRENT,title='Mean-value')
  img03 = image(mid,LAYOUT=[3,1,3],/CURRENT,title='Mid-value')
   
END

效果图