Blocking effect reduction of JPEG images by signal adaptive filtering

Author

Lee, Y.L. ; Kim, H.C. ; Park, H.W.

Author_Institution

Dept. of Inf. & Commun. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea

Volume

7

Issue

2

fYear

1998

fDate

2/1/1998 12:00:00 AM

Firstpage

229

Lastpage

234

Abstract

A postprocessing algorithm is proposed to reduce the blocking artifacts of Joint Photographic Experts Group (JPEG) decompressed images. The reconstructed images from JPEG compression produce noticeable image degradation near the block boundaries, in particular for highly compressed images, because each block is transformed and quantized independently. The blocking effects are classified into three types of noises in this paper: grid noise, staircase noise, and corner outlier. The proposed postprocessing algorithm, which consists of three stages, reduces these blocking artifacts efficiently. A comparison study between the proposed algorithm and other postprocessing algorithms is made by computer simulation with several JPEG images

Keywords

adaptive decoding; adaptive filters; digital filters; image reconstruction; interference suppression; noise; JPEG images; block boundaries; blocking effect reduction; corner outlier; decompressed images; grid noise; highly compressed images; image degradation; postprocessing algorithm; reconstructed images; signal adaptive filtering; staircase noise; Adaptive filters; Data compression; Degradation; Discrete cosine transforms; Filtering algorithms; Image coding; Image storage; Noise reduction; PSNR; Transform coding;

fLanguage

English

Journal_Title

Image Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7149

Type

jour

DOI

10.1109/83.661000

Filename

661000