NDLI: Importance weighted image enhancement for prosthetic vision: An augmentation framework

Content Provider	IEEE Xplore Digital Library
Author	McCarthy, C. Barnes, N.
Copyright Year	2014
Abstract	Augmentations to enhance perception in prosthetic vision (also known as bionic eyes) have the potential to improve functional outcomes significantly for implantees. In current (and near-term) im-plantable electrode arrays resolution and dynamic range are highly constrained in comparison to images from modern cameras that can be head mounted. In this paper, we propose a novel, generally applicable adaptive contrast augmentation framework for prosthetic vision that addresses the specific perceptual needs of low resolution and low dynamic range displays. The scheme accepts an externally defined pixel-wise weighting of importance describing features of the image to enhance in the output dynamic range. Our approach explicitly incorporates the logarithmic scaling of enhancement required in human visual perception to ensure perceivability of all contrast augmentations. It requires no pre-existing contrast, and thus extends previous work in local contrast enhancement to a formulation for general image augmentation. We demonstrate the generality of our augmentation scheme for scene structure and looming object enhancement using simulated prosthetic vision.
Sponsorship	IEEE Vis.Graph.Tech.Comm.
Starting Page	45
Ending Page	51
File Size	1017871
Page Count	7
File Format	PDF
ISBN	9781479961849
DOI	10.1109/ISMAR.2014.6948408
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-10
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dynamic range Prosthetics Image resolution Visualization Brightness Histograms Equations
Content Type	Text
Resource Type	Article

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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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