NDLI: Wide-Angle Foveation for All-Purpose Use

Content Provider	IEEE Xplore Digital Library
Author	Shimizu, S.
Copyright Year	1996
Abstract	This paper proposes a model of a wide-angle space-variant image that provides a guide for designing a fovea sensor. First, an advanced wide-angle foveated (AdWAF) model is formulated, taking all-purpose use into account. This proposed model uses both Cartesian (linear) coordinates and logarithmic coordinates in both planar projection and spherical projection. Thus, this model divides its wide-angle field of view into four areas, such that it can represent an image by various types of lenses, flexibly. The first simulation compares with other lens models, in terms of image height and resolution. The result shows that the AdWAF model can reduce image data by 13.5%, compared to a log-polar lens model, both having the same resolution in the central field of view. The AdWAF image is remapped from an actual input image by the prototype fovea lens, a wide-angle foveated (WAF) lens, using the proposed model. The second simulation compares with other foveation models used for the existing log-polar chip and vision system. The third simulation estimates a scale-invariant property by comparing with the existing fovea lens and the log-polar lens. The AdWAF model gives its planar logarithmic part a complete scale-invariant property, while the fovea lens has 7.6% error at most in its spherical logarithmic part. The fourth simulation computes optical flow in order to examine the unidirectional property when the fovea sensor by the AdWAF model moves, compared to the pinhole camera. The result obtained by using a concept of a virtual cylindrical screen indicates that the proposed model has advantages in terms of computation and application of the optical flow when the fovea sensor moves forward.
Starting Page	587
Ending Page	597
Page Count	11
File Size	3752169
File Format	PDF
ISSN	10834435
Volume Number	13
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Lenses Optical sensors Optical computing Image resolution Computational modeling Image motion analysis Image sensors Prototypes Machine vision Cameras wide-angle foveation (WAF) Active sensing all-purpose use biomimetics fovea sensor image processing
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications

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

Development of wide angle fovea telescope

Wide angle vision sensor with fovea-navigation of mobile robot based on cooperation between central vision and peripheral vision

Motion deblurring using hybrid imaging

Development of micro wide angle fovea lens

Wide-Angle Foveation for All-Purpose Use

Shifted fovea multiresolution geometries

Wide-Angle Foveation for All-Purpose Use

Depth recovery using active focus in robotics (vision)

Automated sensor planning for robotic vision tasks

Wide-Angle Foveation for All-Purpose Use

Similar Documents

Development of wide angle fovea telescope

Wide angle vision sensor with fovea-navigation of mobile robot based on cooperation between central vision and peripheral vision

Motion deblurring using hybrid imaging

Development of micro wide angle fovea lens

Wide-Angle Foveation for All-Purpose Use

Shifted fovea multiresolution geometries

Wide-Angle Foveation for All-Purpose Use

Depth recovery using active focus in robotics (vision)

Automated sensor planning for robotic vision tasks

Wide-Angle Foveation for All-Purpose Use