NDLI: Rank-based image transformation for entropy coding efficiently

Content Provider	IEEE Xplore Digital Library
Author	Deuk-Su Han Myung-Jae Lee Kang-Soo You Jang, E.S. Hoon-Sung Kwak
Copyright Year	2005
Description	Author affiliation: Dept. of Image Eng., Chonbuk Nat. Univ., Jeonju, South Korea (Deuk-Su Han; Myung-Jae Lee; Kang-Soo You)
Abstract	In this paper, we introduce a rank-based image transformation which is pre-processing method for gray-level images to be compressed more efficiently by entropy encoder. Before entropy encoding a stream of gray-level values in an image, the proposed method counts co-occurrence frequencies for neighboring pixel values. Then, it replaces each pairs of adjacent gray values with particular ordered number based on the investigated co-occurrence frequencies. Finally, the method transmits the adjusted data which has ordered number to entropy encoder. Because statistical characteristic is more enhanced by this preprocessing step, it is possible to improve performance of entropy coding. From the simulation result using 8 bits gray-scale images, it is verified that the proposed method can reduce bit rate by up to 37.85% than plain entropy coders.
Starting Page	478
Ending Page	482
File Size	190189
Page Count	5
File Format	PDF
ISBN	0769522963
DOI	10.1109/ICIS.2005.106
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-07-14
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Entropy coding Image coding Pixel Digital images Gray-scale Frequency Bit rate Image converters Digital arithmetic Electronic mail
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
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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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