NDLI: A novel approach to real-time bilinear interpolation

Content Provider	IEEE Xplore Digital Library
Author	Gribbon, K.T. Bailey, D.G.
Copyright Year	2004
Description	Author affiliation: Inst. of Inf. Sci. & Technol., Massey Univ., New Zealand (Gribbon, K.T.; Bailey, D.G.)
Abstract	Bilinear interpolation is often used to improve image quality after performing spatial transformation operations such as digital zooming or rotation. In the traditional case where the input coordinates appear in a raster-based fashion, the required pixel values can be obtained from the previous calculation, the frame buffer and a single line cache. This paper presents a novel approach to performing real-time bilinear interpolation that is useful in applications such as lens distortion correction where the input coordinates follow a curved path that spans multiple rows. To help retrieve the required pixels in a single clock cycle under imposed data bandwidth constraints a unique caching system has been devised. In the event that constraints make it impossible to obtain the four required pixel values, the approach performs a modified three-point interpolation. An example field programmable gate array implementation of the bilinear interpolation method used in conjunction with a lens distortion correction algorithm has been successfully completed.
Sponsorship	IEEE Computer Soc. Test Technol. Tech. Council (TTTC) Centre for Very High Speed Microelectronic Systems, Edith Cowan Univ. Australia
Starting Page	126
Ending Page	131
File Size	154281
Page Count	6
File Format	PDF
ISBN	0769520812
DOI	10.1109/DELTA.2004.10055
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-01-28
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image quality Interpolation Image processing Displays Information retrieval Predistortion Pixel Equations Lenses Clocks
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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