Image quality loss and compensation for visually impaired observers

Triantaphillidou, S., Fry, E., Sanchis, V. and Pons, A. 2018. Image quality loss and compensation for visually impaired observers. IS&T Electronic Imaging Symposium: Image Quality System Performance Conference. San Francisco, California, USA 28 Jan - 02 Feb 2018 The Society of Imaging Science and Technology. https://doi.org/10.2352/issn.2470-1173.2018.12.iqsp-365

TitleImage quality loss and compensation for visually impaired observers
AuthorsTriantaphillidou, S., Fry, E., Sanchis, V. and Pons, A.
TypeConference paper
Abstract

The measurement and modeling of image quality are aimed to assist the design and optimization of systems, typically built for ‘normal’ observer vision. But in reality image viewers rarely have perfect vision. There have been few attempts and no universal framework for measuring image quality loss due to visual impairments. The paper presents initial experiments designed to measure still image quality losses, as experienced by observers with visual accommodation problems, by proposing modifications to the Quality Ruler method described in ISO 20462-3:2012. A simple method is then presented, which compensates directly on the display for some of the quality lost due to the impairment. It uses a purpose-built image equalization software. The compensated image is finally examined in terms of quality gained. The losses and gains in image quality are measured on a Standard Quality Scale (SQS), where one unit corresponds to 1 JND. Initial results show that the quality lost due to visual accommodation impairments can be accurately measured with the modified ruler method. The loss is scene-dependent. Partial or full quality compensation can be achieved for such impairments, using image contrast equalization; the level of quality gained also scenedependent.

Keywordsimage quality, visually impaired, ISO 20462-3:2012. scene dependency
Year2018
ConferenceIS&T Electronic Imaging Symposium: Image Quality System Performance Conference
PublisherThe Society of Imaging Science and Technology
Accepted author manuscript
Publication dates
Published2018
JournalIS and T International Symposium on Electronic Imaging Science and Technology
ISSN2470-1173
Book titleIS&T International Symposium on Electronic Imaging 2018: Image Quality and System Performance XV proceedings
Digital Object Identifier (DOI)https://doi.org/10.2352/issn.2470-1173.2018.12.iqsp-365
Web address (URL)http://www.scopus.com/inward/record.url?eid=2-s2.0-85055757963&partnerID=MN8TOARS

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