load noisbloc
x = noisbloc;
t = wpdec(x,3,'sym4');
plot(t);
% Change Node Label from Depth_position to Index and
% click the node (0). You get the following plot.
% Global thresholding.
t1 = t;
sorh = 'h';
thr = wthrmngr('wp1ddenoGBL','penalhi',t);
cfs = read(t,'data');
cfs = wthresh(cfs,sorh,thr);
t1 = write(t1,'data',cfs);
plot(t1)
% Change Node Label from Depth_position to Index and
% click the node (0). You get the following plot.
% Node by node thresholding.
t2 = t;
sorh = 's';
thr(1) = wthrmngr('wp1ddenoGBL','penalhi',t);
thr(2) = wthrmngr('wp1ddenoGBL','sqtwologswn',t);
tn = leaves(t);
for k=1:length(tn)
node = tn(k);
cfs = read(t,'data',node);
numthr = rem(node,2)+1;
cfs = wthresh(cfs,sorh,thr(numthr));
t2 = write(t2,'data',node,cfs);
end
plot(t2)
% Change Node Label from Depth_position to Index and
% click the node (0). You get the following plot.
