Title :
A hybrid DCT-SVD image-coding algorithm
Author :
Dapena, Adriana ; Ahalt, Stanley
Author_Institution :
Departamento de Electronica y Sistemas, Univ. de La Coruna, Spain
fDate :
2/1/2002 12:00:00 AM
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;
Journal_Title :
Circuits and Systems for Video Technology, IEEE Transactions on
