Efficient Pre-Coding Techniques for Wavelet-Based Image Compression

Bitrate (kbit)28303234

363840

42

44

1015202530P S N R (d B )Akiyo

VM 5.1Bitrate (kbit/s)323436384016202428323640P S N R (d B )

00-350

-1-3020

-101-20001212-level dyadic subband

decomposition

Partitioning 3Aggregation/12

Aggregation

Zerotree Run-Length Conditioning

001110000

101

110011

11351231*12

*

***

***-+-*+-+-+-**

*

**+

****2

11+sign map