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61981

IMAGE COMPRESSION USING VECTOR QUANTIZATION IN THE WAVELET DOMAIN

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Last updated: 04 Jan 2025

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Abstract

Image compression becomes the main task for reducing the image bit rate with acceptable reconstructed image quality. Wavelet transform shows a good way of subdividing the image into different subbands with different resolutions which are quantized to reduce the image bit rate. This paper introduces the application of Vector qauntization (VQ) to the image subbands in the wavelet domain. The image spectrum is decomposed into hierarchical subbands using the wavelet transform. Three methods of codebook generation are discussed namely, global codebook, local codebook, and variance based codebook with application to image subbands for different block sizes. The quantized coefficients and the baseband are Hufmann coded. Results showed that the local codebook based method gave better peak signal to noise ratio (PSNR) than the global codebook with nearly the same compression ratio (CR). But for variance based method, the visual quality of the reconstructed image is better than those of the two other methods for nearly the same PSNR, and CR as the edges are preserved.

DOI

10.21608/iceeng.1998.61981

Keywords

Image compression, Wavelets, Vector Quantization

Authors

First Name

A.

Last Name

Ragab

MiddleName

S.

Affiliation

Ph. D, Dpt. of Electronic Engineering, Military Technical College, Cairo, Egypt.

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First Name

Abdalla

Last Name

Mohamed

MiddleName

S. A.

Affiliation

Professor, Dpt, of Systems & Biomedical Engineering, Cairo University, Cairo, Egypt.

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Orcid

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First Name

M.

Last Name

Hamid

MiddleName

S.

Affiliation

Graduate student, Dpt. of Electronic Engineering, Military Technical College, Cairo, Egypt.

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Volume

1

Article Issue

1st International Conference on Electrical Engineering ICEENG 1998

Related Issue

9113

Issue Date

1998-03-01

Receive Date

2019-11-26

Publish Date

1998-03-01

Page Start

545

Page End

553

Print ISSN

2636-4433

Online ISSN

2636-4441

Link

https://iceeng.journals.ekb.eg/article_61981.html

Detail API

https://iceeng.journals.ekb.eg/service?article_code=61981

Order

53

Type

Original Article

Type Code

833

Publication Type

Journal

Publication Title

The International Conference on Electrical Engineering

Publication Link

https://iceeng.journals.ekb.eg/

MainTitle

IMAGE COMPRESSION USING VECTOR QUANTIZATION IN THE WAVELET DOMAIN

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Article

Created At

22 Jan 2023