DWT

i am working on dwt2 with mode as 'db2' problem i am facing is that size of cA is not exactly half of image used,which create problem in further part if anyone knows plz help

Answer 1

[Wayne King]

Hi Kush, that is because the default extension mode for the DWT is not periodic. First, set the extension mode to 'per'

dwtmode('per');

Then use dwt2()

load woman;
dwtmode('per');
[A,H,V,D] = dwt2(X,'db2');