i've an gray scale image I to be decomposed...i want to extract the low frequency and high frequency component out of it...can anybody help me?

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pammy 2013-4-12

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i want to extract the low frequency component(approximate) LL1 and high frequency component (detail) HH1 at scale one.

can anybody tell me how this is to be done....

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Michael 2013-4-12

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I don't know what LL1 or HH1 are but the 2D discrete Fourier transform should find you the frequency components of the image, in MATLAB it's "fft2".

sir i've posted my question second time earlier my question was not answered by anyone about an month ago...the toolbox is the wavelet toolbox... there are many inbulit function on wavelet like discrete wavelet transform it is dwt2,fft2,dct2 and so on but i want the inbuilt function for dyadic wavelet transform

i got two function

   dyaddown(inputImage);
  dyadup(inputImage);

but this includes upsamplindg and downsampling...i use Dyadic wavelet transform because it is shift invariant and does not involve downsampling.

nobody is responding on my question.m feeling helpless and in a trouble..

can u tell me the email id of experts who are involve in wavelets?

Image Analyst 2013-4-13

If you have a support contract, you can call the Mathworks and ask for help from someone such as Wayne King, otherwise you'll have to try in this Answers forum. Search the Answers forum and File Exchange for Wavelet and you'll find lots of people you can contact.

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