Title
Real-time geometric lens distortion correction using a graphics processing unit Real-time geometric lens distortion correction using a graphics processing unit
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Bellingham, Wash. ,
Subject
Physics
Engineering sciences. Technology
Source (journal)
Optical engineering / Society of Photo-Optical Instrumentation Engineers. - Bellingham, Wash.
Volume/pages
51(2012) :2 , p. 027002,1-027002,5
ISSN
0091-3286
Article Reference
027002
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Optical imaging systems often suffer from distortion artifacts which impose important limitations on the direct interpretation of the images. It is possible to correct for these aberrations through image processing, but due to their calculation-intensive nature, the required corrections are typically performed offline. However, with image-based applications that operate interactively, real-time correction of geometric distortion artifacts can be vital. We propose a new method to generate undistorted images by implementing the required distortion correction algorithm on a commercial graphics processing unit (GPU), distributing the necessary calculations to many stream processors that operate in parallel. The proposed technique is not limited to affine lens distortions but allows for the correction of arbitrary geometric image distortion artifacts through individual pixel resampling at display rates of more than 30 frames per second for fully processed images (1024×768  pixels). Our method enables real-time GPU-based geometric lens distortion correction without the need for additional digital image processing hardware.
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