An Image Processing Approach to Pre-compensation for Higher-Order Aberrations in the Eye

Human beings rely heavily on vision for almost all of the tasks that are required in daily life. Because of this dependence on vision, humans with visual limitations, caused by genetic inheritance, disease, or age, will have difficulty in completing many of the tasks required of them. Some individua...

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Main Authors: Miguel Alonso Jr, Armando Barreto
Format: Article
Language:English
Published: International Institute of Informatics and Cybernetics 2004-06-01
Series:Journal of Systemics, Cybernetics and Informatics
Subjects:
Online Access:http://www.iiisci.org/Journal/CV$/sci/pdfs/P808607.pdf
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spelling doaj-5bda61dbce554c299bcb863340e0d80e2020-11-24T23:30:54ZengInternational Institute of Informatics and CyberneticsJournal of Systemics, Cybernetics and Informatics1690-45242004-06-012314An Image Processing Approach to Pre-compensation for Higher-Order Aberrations in the EyeMiguel Alonso Jr0Armando Barreto1 Department of Electrical and Computer Engineering, Florida International University Miami, FL, 33174, USA Departments of Electrical and Computer Engineering and Biomedical Engineering, Florida International University, Miami, FL, 33174, USA Human beings rely heavily on vision for almost all of the tasks that are required in daily life. Because of this dependence on vision, humans with visual limitations, caused by genetic inheritance, disease, or age, will have difficulty in completing many of the tasks required of them. Some individuals with severe visual impairments, known as high-order aberrations, may have difficulty in interacting with computers, even when using a traditional means of visual correction (e.g., spectacles, contact lenses). This is, in part, because these correction mechanisms can only compensate for the most regular (low-order) distortions or aberrations of the image in the eye. This paper presents an image processing approach that will pre-compensate the images displayed on the computer screen, so as to counter the effect of the eye's aberrations on the image. The characterization of the eye required to perform this customized pre-compensation is the eye's Point Spread Function (PSF). Ophthalmic instruments generically called "Wavefront Analyzers" can now measure this description of the eye's optical properties. The characterization provided by these instruments also includes the "higher-order aberration components" and could, therefore, lead to a more comprehensive vision correction than traditional mechanisms. This paper explains the theoretical foundation of the methods proposed and illustrates them with experiments involving the emulation of a known and constant PSF by interposing a lens in the field of view of normally sighted test subjects.http://www.iiisci.org/Journal/CV$/sci/pdfs/P808607.pdf DeblurringOptical transfer functionPoint spread functionRetinaPre-deblurringDeconvolution
collection DOAJ
language English
format Article
sources DOAJ
author Miguel Alonso Jr
Armando Barreto
spellingShingle Miguel Alonso Jr
Armando Barreto
An Image Processing Approach to Pre-compensation for Higher-Order Aberrations in the Eye
Journal of Systemics, Cybernetics and Informatics
Deblurring
Optical transfer function
Point spread function
Retina
Pre-deblurring
Deconvolution
author_facet Miguel Alonso Jr
Armando Barreto
author_sort Miguel Alonso Jr
title An Image Processing Approach to Pre-compensation for Higher-Order Aberrations in the Eye
title_short An Image Processing Approach to Pre-compensation for Higher-Order Aberrations in the Eye
title_full An Image Processing Approach to Pre-compensation for Higher-Order Aberrations in the Eye
title_fullStr An Image Processing Approach to Pre-compensation for Higher-Order Aberrations in the Eye
title_full_unstemmed An Image Processing Approach to Pre-compensation for Higher-Order Aberrations in the Eye
title_sort image processing approach to pre-compensation for higher-order aberrations in the eye
publisher International Institute of Informatics and Cybernetics
series Journal of Systemics, Cybernetics and Informatics
issn 1690-4524
publishDate 2004-06-01
description Human beings rely heavily on vision for almost all of the tasks that are required in daily life. Because of this dependence on vision, humans with visual limitations, caused by genetic inheritance, disease, or age, will have difficulty in completing many of the tasks required of them. Some individuals with severe visual impairments, known as high-order aberrations, may have difficulty in interacting with computers, even when using a traditional means of visual correction (e.g., spectacles, contact lenses). This is, in part, because these correction mechanisms can only compensate for the most regular (low-order) distortions or aberrations of the image in the eye. This paper presents an image processing approach that will pre-compensate the images displayed on the computer screen, so as to counter the effect of the eye's aberrations on the image. The characterization of the eye required to perform this customized pre-compensation is the eye's Point Spread Function (PSF). Ophthalmic instruments generically called "Wavefront Analyzers" can now measure this description of the eye's optical properties. The characterization provided by these instruments also includes the "higher-order aberration components" and could, therefore, lead to a more comprehensive vision correction than traditional mechanisms. This paper explains the theoretical foundation of the methods proposed and illustrates them with experiments involving the emulation of a known and constant PSF by interposing a lens in the field of view of normally sighted test subjects.
topic Deblurring
Optical transfer function
Point spread function
Retina
Pre-deblurring
Deconvolution
url http://www.iiisci.org/Journal/CV$/sci/pdfs/P808607.pdf
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