Scilab Wavelet Toolbox Function
Last update : June 2007
idwt2 - Two Dimension Inverse Discrete Fast Wavelet Transform
Calling Sequence
-
X=idwt2(CA,CH,CV,CD,wname,[S])
-
X=idwt2(CA,CH,CV,CD,Lo_R,Hi_R,[S])
Parameters
-
wname
: wavelet name
-
X
: reconstructed matrix
-
Lo_R
: lowpass synthesis filter
-
Hi_R
: highpass syntheis filter
-
S
: restruction size of row and column
-
CA
: approximation coefficent
-
CH
: horizontal detail coefficent
-
CV
: vertical detail coefficent
-
CD
: diagnoal detail coefficent
Description
idwt2 is for two dimension inverse discrete fast wavelet transform. Coefficent could be void vector as '[]' for either of CA, CH, CV or CD.
Examples
x=rand(100,100);
[CA,CH,CV,CD]=dwt2(x,'db2','mode','asymh');
x0=idwt2(CA,CH,CV,CD,'db2',[100 100]);
Author
Roger Liu and Isaac Zhi
See Also
dwt2
,