NDLI: Image foveation based on vector quantization

Content Provider	IEEE Xplore Digital Library
Author	Ebrahimi-Moghadam, A. Shirani, S.
Copyright Year	2003
Description	Author affiliation: Commun. Res. Lab., McMaster Univ., Hamilton, Ont., Canada (Ebrahimi-Moghadam, A.; Shirani, S.)
Abstract	Summary form only given. The perceptual resolution of vision is greatly space variant and is highest at the point of fixation and decreases rapidly away from this point. Novel unstructured and structured vector quantization (VQ) schemes are proposed to take advantage of this property of the human visual system (HVS) by providing the best image quality around the fixation point. As a foveation technique, the unstructured VQ does not enjoy progressive transmission in the sense that any request of improvement in the ROI is always replied by complete retransmission of image vectors with a higher resolution VQ scheme. The structured VQ, which is based on a residual vector quantizer (RVQ), yields an embedded progressive bit stream. The main idea for the RVQ foveation is to use more quantization stages for image vectors closer to the fixation point. This method allows the receiver to change its fixation point without any waste of transmitted information and to have multiple fixation points. This quantization strategy enables gradual image resolution change from the ROI to the background.
Sponsorship	Brandeis Univ
File Size	207048
File Format	PDF
ISBN	0769518966
ISSN	10680314
DOI	10.1109/DCC.2003.1194045
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-03-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Vector quantization Image resolution Humans Visual system Image quality Streaming media Scalability Image coding Degradation Pixel
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications

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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