filter_2x2bnd

 filter_2x2bnd(filt_id,img,x_dim,y_dim,
      ro,kappa,N,analysis)
      char *filt_id;   
      float **img;     
      int x_dim, y_dim;
      int ro, kappa; 
      int N;         
      int analysis;

• Filter-identifier, a character string like i.e. `f16b', `i_2_1_smpl' etc. Note that a filter identifier starting with `f' is assumed to represent a FIR filter with the sum of the coeffisients equal to 1.0, an identifier starting with `i' is a polyphase-allpass IIR filter and an identifier starting with `w' is a wavelet FIR filter. See: John Haakon Husoey, PhD dissertation, 1990, Norwegian Institute of Technology
• Image array, accessible as a float array x[m][n]
• x (m - vertical) dimension, number of pixels
• y (n - horizontal) dimension, number of pixels
• Vertical subband, ro, 0 or 1; 0 is lowpass
• Horizontal subband, kappa, 0 or 1
• N: Filter by .
• A boolean flag indicating wheter this is an analysis bank (TRUE) or a synthesis bank (FALSE)