Function: framedual

FRAMEDUAL  Construct the canonical dual frame
  Usage: Fd=framedual(F);

  Fd=FRAMEDUAL(F) returns the canonical dual frame of F.

  The canonical dual frame can be used to get perfect reconstruction as in
  the following example:

    % Create a frame and its canonical dual
    F=frame('dgt','hamming',32,64);
    Fd=framedual(F);

    % Compute the frame coefficients and test for perfect
    % reconstruction
    f=gspi;
    c=frana(F,f);
    r=frsyn(Fd,c);
    norm(r(1:length(f))-f)

Url: http://ltfat.github.io/doc/frames/framedual.html

See also: frame, framepair, frametight.

Package: ltfat