NDLI: Efficient Algorithm for Removing Blocking Artifacts in JPEG Compressed Images

Content Provider	IEEE Xplore Digital Library
Author	Nallaperumal, K. Ranjani, J.J.
Copyright Year	2005
Description	Author affiliation: Centre for Information Technology & Engineering, Manonmaniam Sundaranar University, Tirunelveli - 627012, Phone:+91-462-2323650, Fax: :+91-462-2334363, email:krishnan17563@yahoo.com (Nallaperumal, K.)
Abstract	Despite their widespread popularity, the Joint Photographers Expert Group (JPEG) compression standard can lead to noticeable 'blocking artifacts'. High frequency details of the coded images are mainly contaminated by quantization noise. The deblocking approach of JPEG compressed images using overcomplete wavelet representation can be improved by preserving the image details and reducing the effect of quantization noise as much as possible. An estimation of the actual pixel is obtained from the decoded image. The edge information is extracted from this estimated image by exploiting the cross-scale correlations among the wavelet coefficients and is protected, while the blocking effects in the smooth background regions are smoothed out in the wavelet domain without much blurring. A better improvement in visual quality is achieved if Dual Tree Complex Wavelet filters are used instead of the Dyadic Discrete Wavelet Transform.
Starting Page	245
Ending Page	249
File Size	1677538
Page Count	5
File Format	PDF
ISBN	0780395034
DOI	10.1109/INDCON.2005.1590165
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-12-11
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Overcomplete wavelet Blocking artifact Noise reduction edge enhancement Quantization wavelet denoising JPEG Discrete wavelet transforms Decoding Data mining Wavelet coefficients Image coding Transform coding post processing Frequency Dual Tree Complex wavelet filters Pixel
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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