?? imagewt.m
字號:
function ImageWT(wt,n,s_scale,l_scale)
% 畫出信號的小波變換結果
scale = l_scale-s_scale+1;
% ytix = linspace( log2(l_scale)-log2(n),log2(s_scale)-log2(n),l_scale-s_scale+1);
ytix = linspace( log2(l_scale),log2(s_scale),l_scale-s_scale+1);
xtix = linspace(0,n,n);
for k=1:scale,
amax = max(wt(k,:));
amin = min(wt(k,:));
wt(k,:) = ((wt(k,:))-amin) ./ (amax-amin) .*256;
end
image(xtix,ytix, flipud(wt));
axis('ij');
xlabel('');
ylabel('log2(s)');
str = sprintf('colormap(1-%s(256))','gray');
eval(str);
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