Edge preservative VQ based on the projection of images

Author

Park, Hee Bok ; Seo, Bo Seok ; Kang, Dong Wook ; Lee, Choong Woong

Author_Institution

Dept. of Electron. Eng., Seoul Nat. Univ., South Korea

Volume

38

Issue

3

fYear

1992

fDate

8/1/1992 12:00:00 AM

Firstpage

460

Lastpage

464

Abstract

The authors present an image compression scheme which has a good image quality based on vector quantization (VQ) of projections instead of the image itself and on simple postprocessing. The projection procedure makes it possible to transmit the edge preserving information. Usually the vector dimensions of projections are much smaller than that of the block, so it is possible to process a larger block in the projection domain than in the spatial domain with similar computational complexity. Processing large blocks can reduce the transmission bit rate by exploiting more interpixel correlation. As the block size increases, the blocking effect is more pronounced on background areas. To reduce this artifact, postprocessing is required. A multiorder polynomial interpolator for postprocessing the pixels was applied at and near the boundaries of background blocks. Simulation results show that the performance of the suggested scheme was superior to that of the normal VQ scheme

Keywords

data compression; edge detection; image coding; vector quantisation; VQ; block size; blocking effect; computational complexity; edge preserving information; image coding; image compression; image projection; image quality; interpixel correlation; multiorder polynomial interpolator; performance; postprocessing; projection domain; simulation results; transmission bit rate; vector dimensions; vector quantization; Bit rate; Computational complexity; Decoding; Degradation; Humans; Image coding; Image quality; Image reconstruction; PSNR; Polynomials;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.156723

Filename

156723