NDLI: Adapting JPEG2000 bit allocation to preserve features of interest

Content Provider	IEEE Xplore Digital Library
Author	Verleysen, C. Merlin, N. Vleeschouwer, C.D.
Copyright Year	2011
Description	Author affiliation: ICTEAM institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium (Verleysen, C.; Merlin, N.; Vleeschouwer, C.D.)
Abstract	Nowadays, the demands for higher quality and flexibility in accessing compressed images has led to a gradual replacement of the ubiquitous JPEG standard by the recent JPEG2000 compression standard in various domains. Similar to other compression standards, this new algorithm tends to deteriorate some of the intrinsic geometrical features of the image. For example, the direction of the edges are not well conserved after compression. This papers shows that the optimization metric generally used in JPEG2000, the mean squared error (MSE), is responsible for the non-uniform deterioration of the shapes' angle. To address this problem, a general method of modifying the MSE into any other additive metric is presented and applied to the conservation of underlying shapes' directional information. This modification is handled in a way that does not change the intrinsic implementation and functionalities of any JPEG2000 encoder. This general method of balancing the shapes' deterioration builds on the definition of a directional metric and the computation of edge direction based on a modified Hough Transform, which allows to determine the shapes' slopes with an error of less than the degree, even with low PSNR pictures (up to 15dB). Finally, it is illustrated how our contribution increases the performance of the JPEG2000, when all singularities of an image must be conserved in spite of high compression rates.
Starting Page	602
Ending Page	606
File Size	1164054
Page Count	5
File Format	PDF
ISBN	9781424493043
e-ISBN	9781424493067
DOI	10.1109/CISP.2011.6100346
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-10-15
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	JPEG2000 Image coding Shape Image edge detection Bit rate Transform coding Transforms directional metric Hough Transform Image compression
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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