Title :
Removal of blocking artifacts in JPEG compressed images using dual tree complex wavelet filters for multimedia on the Web
Author :
Nallaperumal, Krishnan ; Ranjani, Jennifer J. ; Christopher, Seldev ; Saudia, S.
Author_Institution :
Centre for Inf. Technol. & Eng., Manonmaniam Sundaranar Univ., Tirunelveli
Abstract :
The popular international standard for compression, the Joint Photographers Expert Group (JPEG) quite often leads to noticeable discontinuities along the boundaries called the `blocking artifacts´. When the image is JPEG compressed the high frequency details of the coded image are mainly contaminated by quantization noise. An estimation of the actual pixel is obtained from the decoded image. The estimated image is denoised using dual tree complex wavelet transform (DTCWT), which is a variant of discrete wavelet transform. This transformation ensures approximate shift invariance and directional selectivity properties that are lacking in the traditional wavelet transform
Keywords :
Internet; discrete wavelet transforms; filtering theory; image coding; image denoising; image resolution; multimedia communication; JPEG compressed images; Joint Photographers Expert Group; Web; blocking artifacts removal; discrete wavelet transform; dual tree complex wavelet filters; dual tree complex wavelet transform; image denoising; multimedia; quantization noise; Discrete wavelet transforms; Frequency; Humans; Image coding; Information filtering; Information filters; Noise reduction; Pixel; Quantization; Transform coding; Blocking artifact; Dual Tree Complex wavelet filters; JPEG; Overcomplete wavelet; post processing; wavelet denoising;
Conference_Titel :
Wireless and Optical Communications Networks, 2006 IFIP International Conference on
Conference_Location :
Bangalore
Print_ISBN :
1-4244-0340-5
DOI :
10.1109/WOCN.2006.1666679
