NDLI: Regularized Restoration Using Image Fusion for Digital Auto-Focusing

Content Provider	IEEE Xplore Digital Library
Author	Maik, V. Dohee Cho Jeongho Shin Joonki Paik
Copyright Year	1991
Abstract	Fusion-based image restoration is an effective way to remove multiple out-of-focus blurs in images. Although image restoration and image fusion have been successfully investigated and developed over the years, little effort has been made to combine them. In this paper, we present an integration method of the two approaches and make them benefit from each other to obtain significantly improved performance. Based on the proposed fusion approach, we present a novel digital auto-focusing algorithm, which restores an image with multiple, differently out-of-focused objects. To this end, an out-of-focused image is first restored by using a directionally regularized iterative restoration with multiple regularization parameters. By assembling multiple, restored regions from consecutive levels of iterations, a salient focus measure is formed as a new query using sum modified Laplacian (SML). An auto-focusing error metric (AFEM) is used as an appropriate termination criterion for iterative restoration. A novel soft decision fusion and blending (SDFB) algorithm combines images from restored by different point-spread functions (PSFs) and enables smooth transition across region boundaries for creating the finally restored image using a pseudo activity measure. Experimental results show that the proposed auto-focusing algorithm provides sufficiently high-quality restored images so that it can be used for devices such as a digital camera and a camcorder.
Sponsorship	IEEE Circuits and Systems Society
Starting Page	1360
Ending Page	1369
Page Count	10
File Size	3906696
File Format	PDF
ISSN	10518215
Volume Number	17
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image restoration Image fusion Focusing Iterative algorithms Degradation Laboratories Digital cameras Video equipment Digital images Computational complexity soft decision fusion Digital auto-focusing regularized iterative restoration
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Media Technology

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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