dctm_four.m

生成DCT矩阵,只要简单输入矩阵的阶数,就可以返回一个用语DCT变换的矩阵

%this program is for the call of the dct transform matrix of type -1111
function dctm_four=dctm2(n)
for p=0:(n-1)
    for q=0:(n-1)
        t(p+1,q+1)=(2/n)^(1/2)*cos(pi*(q+1/2)*(p+1/2)/n);
    end
end
dctm_four=t