Title :
Hierarchical mean-residual image vector quantiser using gradient-Laplacian subspace distortion
Author :
Po, L.M. ; Chan, Calvin K.
Author_Institution :
Dept. of Electron. Eng., City Polytech. of Hong Kong, Kowloon, Hong Kong
Abstract :
A new hierarchical mean-residual image vector quantiser (HMRIVQ) using a general 4-dimensional gradient-Laplacian subspace distortion (GLSD) is proposed. With the use of the GLSD the computational and storage costs of the encoder are significantly reduced. The HMRIVQ can also achieve a very high compression rate for low detailed images.
Keywords :
encoding; picture processing; compression rate; encoder; gradient-Laplacian subspace distortion; hierarchical mean-residual image vector quantiser; low detailed images; storage costs;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19900876
