A hybrid DCT-SVD image-coding algorithm

Author

Dapena, Adriana ; Ahalt, Stanley

Author_Institution

Departamento de Electronica y Sistemas, Univ. de La Coruna, Spain

Volume

12

Issue

2

fYear

2002

fDate

2/1/2002 12:00:00 AM

Firstpage

114

Lastpage

121

Abstract

We propose an image-coding algorithm which combines the discrete cosine transform (DCT) and the singular value decomposition (SVD). The DCT is used to transform those blocks in the source image that exhibit a high correlation, while blocks with greater high-frequency content are transformed using the SVD. A simple criterion is used to decide which transform should be used on each block. Simulation results show that the new hybrid algorithm provides good distortion, bit rate, and image quality-especially in images which are less spatially correlated

Keywords

correlation methods; discrete cosine transforms; image coding; singular value decomposition; transform coding; vector quantisation; bit rate; correlation; discrete cosine transform; distortion; high-frequency content; hybrid DCT-SVD image-coding algorithm; image quality; online adaptive vector quantization; simulation results; singular value decomposition; source image; Bit rate; Discrete cosine transforms; Discrete transforms; Eigenvalues and eigenfunctions; Image coding; Matrix decomposition; Rate distortion theory; Singular value decomposition; Transform coding; Vector quantization;

fLanguage

English

Journal_Title

Circuits and Systems for Video Technology, IEEE Transactions on

Publisher

ieee

ISSN

1051-8215

Type

jour

DOI

10.1109/76.988658

Filename

988658