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Dose output of Extract Wavelet Bands contain any frequency information?

Hi All,

I am working with imaq Extract Wavelet Bands, i want to understand what is the significance of the output of the VI.

Dose the LL,LH,HL....etc contain any frequency information in it?

How the values of the out put LL,LH,HL....etc  array are calculated? 

Can anybody shed some light on this?   

why the output of the array data type is Grayscale(SGL)?

Regards

sk_a

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