multi level 1-D wavelet decomposition

Hi every one

I applied the Multilevel 1-D wavelet decomposition for vector array, by the following syntax:

[C,L] = wavedec(s,3,'haar')

where s is vector and 3 is level-3 and harr is 'haar' filter , I want to know which is the Low frequency and High frequency coefficients after transformation operation thank you

Answer 1

[Minh]

Please try the following MATLAB command

>>doc wavedec

Then do the example in the help documentation, hopefully you will work out which coefficients are for low frequency coefficients and which are for high frequency coefficients. Please note that approximation coefficients correspond to low frequency coefficients and detail coefficients correspond to high frequency coefficients.

cheers,

Minh

[Majid Al-Sirafi]

dear so according to the following equation [C,L] = wavedec(s,3,'haar') you mean that C is low coefficient and L is high coefficient??

cheers, majid

[Muhammad Shahid Jabbar]

Please refer to figure below