wprec2
Wavelet packet reconstruction 2-D
Syntax
Description
Examples
Reconstruct Image Using 2-D Wavelet Packet Tree
Load and display a grayscale image.
load tartan imagesc(X) colormap gray
Use wpdec2
to obtain the 2-level wavelet packet decomposition of the image. Use the Haar wavelet.
wpt = wpdec2(X,2,"haar");
Apply a hard threshold of 75
to the wavelet coefficients. Keep the approximation coefficients.
keepapp = 1;
sorh = "h";
thr = 75;
wptNew = wpthcoef(wpt,keepapp,sorh,thr);
Use wprec2
to reconstruct the image associated with the new wavelet packet tree. Display the results.
xrec = wprec2(wptNew); imagesc(xrec) colormap gray title("Reconstruction of Thresholded Tree")
Input Arguments
wpt
— Wavelet packet tree
wptree
object
Wavelet packet tree, specified as a wptree
object. The
wprec2
function assumes that you obtained
wpt
using wpdec2
.
Output Arguments
Version History
Introduced before R2006a
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