haarmtx

Compute a n*n Haar matrix.

Description

Used in image compression, the haar transform is an alternative to the DCT transformation. This file compute an n*n Haar matrix. (same use as "dctmtx")

• MATLAB release: MATLAB 6.5 (R13)

[Jerome Watkins]

Properly constructs the Haar matrix. The code is not vectorized, but this is fine because you only need to call the function once and can reuse the matrix from that point onward.

[peter vnucak]

nice one

[peter vnucak]

nice one.rhis is my work:
function h=haAar2(N)

%N=2^n;
h=zeros(N,N);
h(1,1:N)=ones(1,N)/sqrt(N);

for k=1:N-1
  p=fix(log(k)/log(2));
  q=k-(2^p);
  k1=2^p; t1=N/k1;
  k2=2^(p+1); t2=N/k2;
  for i=1:t2
    h(k+1,i+q*t1) = (2^(p/2))/sqrt(N);
    h(k+1,i+q*t1+t2) =-(2^(p/2))/sqrt(N);
  

  end
end

[liberty liberty]

don't use "inf" as a variable name!!!!

[tr sa]