Name

dwt2 — Two Dimensional Discrete Fast Wavelet Transform

Calling Sequence

[CA,CH,CV,CD]=dwt2(x,wname,['mode',extMethod])
[CA,CH,CV,CD]=dwt2(x,Lo_D,Hi_D,['mode',extMethod])

Parameters

wname
: wavelet name
x
: double matrix
Lo_D
: lowpass analysis filter
Hi_D
: highpass analysis filter
extMethod
: extension mode, 'zpd' for example
CA
: approximation coefficent
CH
: horizontal detail coefficent
CV
: vertical detail coefficent
CD
: diagonal detail coefficent

Description

dwt2 is for two dimension discrete fast wavelet transform with the signal extension method optional argument.

Examples

  x=rand(100,100);
  [CA,CH,CV,CD]=dwt2(x,'db2','mode','asymh');
 

Authors

Roger Liu and Isaac Zhi

See Also

dwt , dwt3 , idwt , idwt2 , idwt3