Function: frametight

FRAMETIGHT  Construct the canonical tight frame
  Usage: Ft=frametight(F);

  Ft=FRAMETIGHT(F) returns the canonical tight frame of F.

  The canonical tight frame can be used to get perfect reconstruction if
  it is used for both analysis and synthesis. This is demonstrated in the
  following example:

    % Create a frame and its canonical tight
    F=frame('dgt','hamming',32,64);
    Ft=frametight(F);

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

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

See also: frame, framepair, framedual.

Package: ltfat