The Wavelet Digest Homepage
Return to the homepage
Search the complete Wavelet Digest database
Help about the Wavelet Digest mailing list
About the Wavelet Digest
The Digest The Community
 Latest Issue  Back Issues  Events  Gallery
The Wavelet Digest
   -> Volume 7, Issue 10

Preprint: A New Image Compression Algorithm (HEP Algorithm)
images/spacer.gifimages/spacer.gif Reply into Digest
Previous :: Next  
Author Message
lxj (

PostPosted: Wed Sep 30, 1998 3:27 am    
Subject: Preprint: A New Image Compression Algorithm (HEP Algorithm)
Reply with quote

#5 Preprint: A New Image Compression Algorithm (HEP Algorithm)

A New Image Compression Algorithm (HEP Algorithm)

ABSTRACT We know JPEG is faster than Wavelet transform algorithm, but
its fidelity is poorer than Wavelet's. As an international standard,
JPEG/MPEG is widely applied in multimedia fields. In recent years,
several new image codings based on WT have been presented, such as
EZW, HARC, SPIHT et al., these schemes can get better fidelity, but
very slow. If there is a method to combine their benefits, we can get
better fidelity and faster speed. HEP algorithm is doing so. HEP is
based on DCT and WT coding scheme, it is faster than WT coding and
better fidelity than JPEG's. The following results are based on HEP

TEST image : LENNA 512*512*8bit

4.4 42.8 40.9 4.0 44.8
8.4 39.0 37.7 8.0 39.6
15.5 35.8 34.7 16.0 36.3
28.8 32.7 31.2 32.0 33.2
55.2 29.5 24.8 64.0 30.3
106 26.0 -- 128.0 27.5

HEP is over twice as fast as EZW, in addition, the subject evaluation is
better than EZW. There is no blur, no block effects.

Now a new image/speech recognition method based on HEP is been studying
in my research, the primary results manifest that HEP algorithm is very
All times are GMT + 1 Hour
Page 1 of 1

Jump to: 

disclaimer -
Powered by phpBB

This page was created in 0.025185 seconds : 18 queries executed : GZIP compression disabled