wavelet based contourlet transform

Question

nadia 2016-8-16

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/299772-wavelet-based-contourlet-transform

评论： Walter Roberson 2018-7-11

I need wavelet-based contourlet transform matlab code but I cannot find this code,dose function with this ability exist in matlab?can you help me?thanks in advance.

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nadia 2016-8-16

no one can help me!!?

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Answer 1

John BG 2016-8-17

6
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/299772-wavelet-based-contourlet-transform#answer_231983

编辑：John BG 2018-1-21

Nadia

try the following

1.

install this contourlet toolbox, by Minh Do and Martin Vetterli http://uk.mathworks.com/matlabcentral/fileexchange/8837-contourlet-toolbox?s_tid=srchtitle

The same professors Minh Do and Martin Vetterli has a webpage at the Illinois University with more ridglet, contourlet and wavelet MATLAB code.

http://minhdo.ece.illinois.edu/software/

3. Or the non subsampled contourlet toolbox by Arthur Cunha

http://uk.mathworks.com/matlabcentral/fileexchange/10049-nonsubsampled-contourlet-toolbox?s_tid=srchtitle

if you find this answer useful would you please be so kind to mark my answer as Accepted Answer.

To any other reader, please if you find this answer of any help solving your question,

please click on the thumbs-up vote link,

thanks in advance

John BG

<mailto:jgb2012@sky.com jgb2012@sky.com>

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nadia 2016-8-17

thank you John, but if I want to calculate wavelet based contourlet, can this toolbox help me?or this is different from it?

John BG 2018-1-21

Hi Nadia

To the question, is there contourlet code? now you know there is.

To whether such tool may be of help solving your project or you may even be able to solve it without such toolbox, or with any other available tools, it's important firstly to define the problem to solve, that to this point has not been mentioned in this question.

So, would you like to define the problem to solve in this same question? or perhaps you would like to start another question clearly defining input data, processing to solve, expected output, .. anything that you may consider relevant for readers to help you.

If you decide to post another question with the specifics of the problem to solve with wavelets, with Minhdo's tool box, or else, please post a link to next question in this question, to better follow up?

regards

John BG

<mailto:jgb2012@sky.com jgb2012@sky.com>

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Answer 2

Walter Roberson 2016-8-17

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/299772-wavelet-based-contourlet-transform#answer_231992

http://www.mathworks.com/matlabcentral/answers/?term=tag%3A%22contourlet%22

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Evangeline Dhivya 2018-3-9

@Jan Simon: Sorry Since I am a new user of this site I don't have any idea to create a thread. Can you tell how to create it.

Jan 2018-3-9

编辑：Jan 2018-3-9

@Evangeline: Simply press the "Ask" button on top of this page. There you can insert your question.

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Answer 3

PRASHANT AMBADEKAR 2018-7-10

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/299772-wavelet-based-contourlet-transform#answer_328269

编辑：Walter Roberson 2018-7-11

在 MATLAB Online 中打开

I am using the following code

>> Ni=5;
>> Nd=3;
>> nlevels = Nd*ones(1,Ni);
>> a = imread ('cameraman.tif');
>> dfilter = 'dmaxflat7';
>> pfilter = 'maxflat';
>> output = nsctdec( a, nlevels, dfilter, pfilter );

It is showing the following error:

Undefined function or variable 'zconv2'.
 Error in nssfbdec (line 61)
    y1 = zconv2( x, f1, mup );
 Error in nsdfbdec (line 103)
    [y{1}, y{2}] = nssfbdec( x1, k1, k2, q1 ) ;
 Error in nsctdec (line 112)
        xhi_dir = nsdfbdec(xhi, filters, levels(nIndex-1));