Two Dimensional Transform (1)

LL

HL

HH

LH

horizontal

transform

vertical

transform

Transform

each row in LL

Transform

each column in

LLL and HLL

HL

HH

LH

HLL

LLL

HL

HH

LH

HLLL

HHLL

LLLL

LHLL

2 levels of transform gives 7 subbands.

k levels of transform gives 3k + 1 subbands.

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