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Re: Wavelets [message #75779]

Wed, 04 May 2011 09:47

chris_torrence@NOSPAM is currently offline

chris_torrence@NOSPAM
Messages: 528
Registered: March 2007

Senior Member

On Apr 29, 5:23 am, Konstantinos <moonlightsha...@hotmail.gr> wrote:
> Hi to all
>
> I am a new IDL user. I want to use wavelets. The wavelet toolbox is
> not enough for me, Does any one knows (or have) any program that
> performs 2 or 3 D wavelet transform?
>
> Thank you in advance for your answer.
>
> P.S. Sorry about my poor english.

Hi,

Have you looked at the algorithms that ship with IDL? They include
WV_DWT, WV_PWT, WV_FN_MORLET, WV_FN_PAUL, WV_FN_HAAR, WV_FN_SYMLET,
WV_FN_COIFLET, WV_FN_DAUBECHIES, WV_DENOISE, and WV_CWT.

The WV_DWT will handle arrays of up to 8 dimensions. For example, for
a 3-dimensional array:

info = WV_FN_DAUBECHIES(2, wavelet, scaling, ioff, joff)
wv=wv_dwt(randomu(seed,16,16,16),wavelet,scaling,ioff,joff)
help,wv
WV FLOAT = Array[16, 16, 16]

Cheers,
Chris
ITTVIS

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