denoising using wavelet
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How i can do denoising of 2-D signals with wavelet by using matlab cods ? plz help me :(
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Wayne King
il 25 Nov 2011
Modificato: John Kelly
il 27 Mag 2014
I'm not sure why your original post was about 2-D and it turns out that you have 1-D signals.
Yes, what you have done is basically correct. You could also use wden().
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Wayne King
il 25 Nov 2011
Hi, 2-D is an image, a function of two variables. ECG is 1-D signal. It is a function of one variable (time -- even though it is sampled).
If you have two ECG signals, you have two 1-D signals.
Più risposte (2)
Wayne King
il 25 Nov 2011
Hi, You have a couple of options.
1.) use wavemenu. Enter wavemenu at the command line and then choose, Wavelet 2-D, or SWT Denoising 2-D. Starting in R2011b, you can generate MATLAB code for your denoising directly from the wavemenu GUI.
From the command line, you can use wavedec2 and wdencmp, for decimated 2-D Wavelet denoising, and swt2 and wthresh or stationary wavelet 2-D denoising.
There are some good User's Guide examples of using the GUI and generating MATLAB code for 2-D denoising here:
and here:
Note that the generated code in these examples also shows you how to implement 2-D wavelet denoising from the command line.
shivangi b
il 8 Set 2016
Modificato: Walter Roberson
il 11 Set 2016
sir,
for image de-noising using stationary wavelet transform and threshold techiques I have used
THR = wthrmngr('sw1ddenoLVL',METHOD,SWTDEC,SCAL)
command swtdec =db1,scal= 2 ,method ='rigsure'.
couldn't decompose the original image and hard and soft threshold used . plz replay me sir id:shivangisbv@gmail.com
1 Commento
Geoff Hayes
il 11 Set 2016
As this isn't an answer to the posted question, please delete and post as your own question.
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