matlab圖像小波變換-初步2

多分辨率小波圖像變換及係數提取

 

1.相關函數

   wavedec2：多層二維離散小波變換函數

  [C,S] = wavedec2(X,N,'wname')

  [C,S] = wavedec2(X,N,Lo_D,Hi_D)

 

   appcoef2：二維離散小波變換低頻部分系數提取

  A = appcoef2(C,S,'wname',N)

  A = appcoef2(C,S,'wname')

  A = appcoef2(C,S,Lo_R,Hi_R)

  A = appcoef2(C,S,Lo_R,Hi_R,N)

 

   detcoef2：二維離散小波變換高頻部分系數提取