NDLI: A new method for arbitrary shape ROI coding based on ISA-DWT

Content Provider	IEEE Xplore Digital Library
Author	Ping Xu Shanan Zhu
Copyright Year	2005
Description	Author affiliation: Coll. of Electr. Eng., Zhejiang Univ., Hangzhou, China (Ping Xu; Shanan Zhu)
Abstract	In this paper, we propose a new method called arbitrary shape region of interest (ROI) coding based on the integer-to-integer shape adaptive discrete wavelet transform (ISA-DWT). Firstly, the whole image is encoded to measure whether the reconstructed ROI PSNR is higher than the target. If it is true, it means that the estimated ROI PSNR is higher than the target and there is no need to go on to encode the ROI and the background (BG) separately; otherwise the ROI is encoded until the estimated ROI PSNR is higher than the target and then the BG is encoded. ISA-DWT is adopted to transform the arbitrary shape visual object. The well-known set partitioning in hierarchical trees (SPIHT) is modified to generate the compression bit streams. The proposed method has several novelties: 1) it ensures the PSNR of the ROI at first to overcome the unbalance of the ROI and the BG; 2) it does not import redundant wavelet coefficients like the lifting method; 3) it is fit for arbitrary shape ROI coding; 4) it achieves low complexity by reaching the target ROI PSNR.
Starting Page	1018
Ending Page	1021
File Size	2186730
Page Count	4
File Format	PDF
ISBN	0780391373
DOI	10.1109/ICCA.2005.1528271
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-26
Publisher Place	Hungary
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Shape PSNR Image coding Image reconstruction Discrete wavelet transforms Wavelet coefficients Remote sensing Telemedicine Extraterrestrial measurements Image databases
Content Type	Text
Resource Type	Article

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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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