Title :
A practical postprocessing technique for real-time block-based coding system
Author :
Chan, Yuk-Hee ; Hong, Sung-Wai ; Siu, Wan-chi
Author_Institution :
Dept. of Electron. Eng., Hong Kong Polytech. Univ., Kowloon, Hong Kong
fDate :
2/1/1998 12:00:00 AM
Abstract :
A noniterative postprocessing method is proposed to restore the images encoded with block-based compression standards such as Joint Photographic Experts Group (JPEG). This method classifies small local boundary regions according to their intensity distribution and then selects appropriate linear predictors to estimate the corresponding boundary pixels in the regions. This approach is easy to implement and we found in our simulations that its restoration performance was very respectable compared with the reported postprocessing methods
Keywords :
code standards; discrete cosine transforms; image classification; image coding; image restoration; image segmentation; linear predictive coding; real-time systems; telecommunication standards; transform coding; vector quantisation; DCT; JPEG; Joint Photographic Experts Group; block-based compression standards; boundary pixels estimation; image restoration performance; intensity distribution; linear predictors; noniterative postprocessing method; postprocessing methods; practical postprocessing technique; real-time block-based coding system; simulations; small local boundary regions classification; vector quantization; Codecs; Degradation; Discrete cosine transforms; Image coding; Image quality; Image restoration; Pixel; Real time systems; Transform coding; Vector quantization;
Journal_Title :
Circuits and Systems for Video Technology, IEEE Transactions on
