framebounds
DWT filter bank frame bounds
Syntax
Description
Examples
DWT Filter Bank Frame Bounds
Obtain the frame bounds for the orthogonal Daubechies db6
wavelet.
wv = 'db6'; fb = dwtfilterbank('Wavelet',wv)
fb = dwtfilterbank with properties: Wavelet: 'db6' SignalLength: 1024 Level: 6 SamplingFrequency: 1 FilterType: 'Analysis' CustomWaveletFilter: [] CustomScalingFilter: []
[a,b] = framebounds(fb)
a = 1.0000
b = 1.0000
The filter bank has the default filter type Analysis
. Create a second filter bank using the same orthogonal wavelet but with the filter type Synthesis
. Obtain the frame bounds of this filter bank, which are equal to the previous frame bounds.
fbSynthesis = dwtfilterbank('Wavelet',wv,'FilterType','Synthesis'); [a2,b2] = framebounds(fbSynthesis)
a2 = 1.0000
b2 = 1.0000
Create a filter bank for the biorthogonal bior3.9
wavelet. Obtain the frame bounds. The frame bounds are not equal to 1.
wv = 'bior3.9'; fbA = dwtfilterbank('Wavelet',wv); [c,d] = framebounds(fbA)
c = 0.6250
d = 3.2982
Create a second filter bank using the same biorthogonal wavelet but with the filter type Synthesis
. Obtain the frame bounds of this filter bank. Since the wavelet is biorthogonal, the frame bounds change.
fbASynthesis = dwtfilterbank('Wavelet',wv,'FilterType','Synthesis'); [c2,d2] = framebounds(fbASynthesis)
c2 = 0.5502
d2 = 2.0015
Input Arguments
fb
— Discrete wavelet transform filter bank
dwtfilterbank
object
Discrete wavelet transform (DWT) filter bank, specified as a dwtfilterbank
object.
Output Arguments
Version History
Introduced in R2018a
See Also
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