NDLI: Enhanced JPEG compression of documents

Content Provider	IEEE Xplore Digital Library
Author	Prakash, R. Mitchell, J.L. Stepneski, D.A.
Copyright Year	2001
Description	Author affiliation: IBM Payment Solutions, Charlotte, NC, USA (Prakash, R.)
Abstract	The JPEG standard was designed for compression of photographic digital images, but it also works well on digitized documents with only a limited number of shades of gray. For documents in which compression and legibility are more important than preserving all of the intermediate values, preprocessing the images to reduce their dynamic range can enhance JPEG compression, as it selectively discards some noise. If modified quantization tables are substituted for the encoding quantization tables in the JPEG compressed data stream, an unchanged JPEG decoder can restore the dynamic range and increase image contrast. Graphs of the compressed size in bytes vs. dynamic range after the application of different dynamic-range-reduction techniques are given for both Huffman coding and arithmetic coding. Examples of the reconstructed front and back sides of a check with normal processing and enhanced compression are shown.
Sponsorship	IEEE Signal Process. Soc
Starting Page	494
Ending Page	497
File Size	638260
Page Count	4
File Format	PDF
ISBN	0780367251
DOI	10.1109/ICIP.2001.958159
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-10-07
Publisher Place	Greece
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Transform coding Image coding Dynamic range Quantization Digital images Noise reduction Streaming media Decoding Image restoration Huffman coding
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
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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