NDLI: Document image compression by subband system

Content Provider	IEEE Xplore Digital Library
Author	Kok, C.W. Nguyen, T.Q.
Copyright Year	1996
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA (Kok, C.W.; Nguyen, T.Q.)
Abstract	With the advance of optical storage devices, a large amount of office documents can be stored in the form of scanned images which allow a more efficient retrieval system and ease of handling. Image compression is applied to increase the storage efficiency. Traditionally, a subband system has suffered from basis related visual artifacts. Since the document image contains mainly sharp characters and drawings on a monochrome background, strong ringing is expected as the image contains strong edges. The ringing effect is further worsened by the lack of a noise masking background. In this paper, a subband filter with nonnegative scaling functions and small mean square spatial width is considered to suppress the ringing effect and provide good spatial localization for sharp edge reconstruction. A quantization scheme is investigated to exploit the characteristics of the document image for more visually pleasing results. Design examples with high spatial localization property and their application in document image coding are presented.
Starting Page	688
Ending Page	691
File Size	683085
Page Count	4
File Format	PDF
ISBN	0780330730
DOI	10.1109/ISCAS.1996.541818
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-05-15
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image coding Image storage Quantization Filter bank Optical devices Image reconstruction Background noise Optical filters Time domain analysis Frequency
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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