Daniel D. Dilks, Chris I. Baker, Eli Peli, Nancy Kanwisher
Recent work has shown that foveal cortex, deprived of its normal bottom-up input as a result of macular degeneration (MD), begins responding to stimuli presented to a peripheral retinal location....
Reading With a Macular Scofoma //. Retinal Locus For Scanning Text (2009)
George T. Timberlake, Eli Peli, Edward A. Essockf, Reed A. Augliere
To elucidate how patients with macular scotomas use residual functional retina for inspecting visual detail and reading, we tested three patients with dense macular scotomas using a scanning laser...
\j5(O1 Perception and interpretation of high-pass filtered images (2009)
Abstract. Digital high-pass filtering is used frequently to enhance details in scientific, industrial, and military images. High-pass filtered (HPF) images also are used both to illustrate and test...
head-mounted low vision aid (2009)
Abstract High-contrast binary images (black and white without shades of gray) were demonstrated to improve face recognition performance by the visually impaired using static images (Peli et al.,...
ARTICLE IN PRESS Computers in Biology and Medicine ( ) – (2009)
Robert B. Goldstein, Russell L. Woods, Eli Peli
www.intl.elsevierhealth.com/journals/cobm Where people look when watching movies: Do all viewers look at the same place?
Recognition of jagged (pixelated) letters in the periphery (2009)
Li Li, Alex K. Nugent, Eli Peli
Abstract Previous studies found that for a group of mixed low vision observers, letter counting with smooth (anti-aliased) letters was better than with jagged (pixelated) letters on a CRT display...
Fernando Vargas-martín, Eli Peli
ABSTRACT: Purpose. An augmented-view device for patients with severely restricted peripheral visual fields (tunnel vision) was proposed, combining a see-through head-mounted display and a...
Image Enhancement in the JPEG Domain for People With Vision Impairment (2009)
Jinshan Tang, Senior Member, Jeonghoon Kim, Eli Peli
Abstract—An image enhancement algorithm for low-vision patients was developed for images compressed using the JPEG standard. The proposed algorithm enhances the images in the discrete cosine...
The necessary field of view to read with (2009)
Elisabeth M. Fine, Ph. D. A, Matthew P. Kirschenb, Eli Peli
an optimal stand magnifier
Monocular fixation with the optic nerve head: a case report (2009)
Purpose: To document and discuss the case of a patient with left esotropia (ET) who uses the left optic nerve head (ONH) for monocular ÔfixationÕ. Case report: The patient was an 80-year-old male...
Brief Communication Reorganization of Visual Processing in Macular Degeneration (2009)
Chris I. Baker, Eli Peli, Nicholas Knouf, Nancy G. Kanwisher
Macular degeneration (MD), the leading cause of visual impairment in the developed world, damages the central retina, often obliterating foveal vision and severely disrupting everyday tasks such as...
Post-transmission digital video enhancement for people with visual impairments (2009)
Abstract — Image enhancement has been shown to improve the perceived quality of images and video for people with visual impairments. The MPEG coding scheme makes spatial filtering, likely to help...
Fernando Vargas-martin, Eli Peli
The role of peripheral vision in saccade planning: Learning from people with tunnel vision
Reading With a Macular Scofoma /. Retinal Location of Scotoma and Fixation Area (2009)
George T. Timberloke, Martin A. Mainsrer, Eli Peli, Edward A. Essock, Lawrence E. Arend
To investigate how patients with macular scotomas use residual functional retinal areas to inspect visual detail, a scanning laser ophthalmoscope (SLO) was used to map the retinal locations of...
Eli Peli, Fernando Vargas-martín
Abstract. Spectacle-mounted telescopic systems are prescribed for individuals with visual impairments. Bioptic telescopes are typically mounted toward the top of the spectacle lens �or above the...
DOI 10.1007/s00221-003-1383-y RESEARCH ARTICLE (2009)
Abstract Retinal motion caused by reflexive or voluntary eye movements is rarely misinterpreted as object motion, as if the visual system discounted the contribution of these eye movements to retinal...
Glen Mccormack, Eli Peli, Patrick Stone
several potential advantages as a screener. We compared the validity of the NAT to that of the Space Eikonometer in three experiments: (1) aniseikonia was induced by calibrated size lenses in a...
Eli Peli, George M. Young, Clement L. Trempe, Sheldon M. Buzney*t
Digital image enhancement has been proposed as an aid for the visually impaired. The capability of two enhancement techniques to improve recognition of images by patients with central scotoma or...
Jeonghoon Kim, Avni Vora, Eli Peli, Member Spie
image enhancement for the visually impaired
A Feedback-Controlled Interface for Treadmill Locomotion in Virtual Environments (2008)
Lee Lichtenstein, James Barabas, Russell L. Woods, Eli Peli
Virtual environments (VEs) allow safe, repeatable, and controlled evaluations of obstacle avoidance and navigation performance of people with visual impairments using visual aids. Proper simulation...
A Feedback-Controlled Interface for Treadmill Locomotion in Virtual Environments (2008)
Lee Lichtenstein, James Barabas, Russell L. Woods, Eli Peli
Virtual environments (VEs) allow safe, repeatable, and controlled evaluations of obstacle avoidance and navigation performance of people with visual impairments using visual aids. Proper simulation...
Eli Peli, Gang Luo, Alex Bowers, Noa Rensing
We have developed, implemented and tested a novel concept of vision-multiplexing using augmented vision systems for people with vision impairments. Minified contour images from a head-mounted,...
Brief Communication Reorganization of Visual Processing in Macular Degeneration (2008)
Chris I. Baker, Eli Peli, Nicholas Knouf, Nancy G. Kanwisher
Macular degeneration (MD), the leading cause of visual impairment in the developed world, damages the central retina, often obliterating foveal vision and severely disrupting everyday tasks such as...
The impact of non-immersive head-mounted displays (HMD) on the visual field (2007)
Russell L Woods, Ivonne Fetchenheuer, Fernando Vargas-martín, Eli Peli
Non-immersive head-mounted displays (HMDs), those that allow the wearer to interact with their environment while using the HMD, have considerable potential for use in offices, industry, and medicine....
Running title: Lateral Interactions in Peripheral Vision (2007)
Robert G. Giorgi, Grace P. Soong, Russell L. Woods, Eli Peli, Eli Peli
Suggested Running Head: TRACKING THE LINE OF PRIMARY GAZE (2007)
Robert B. Goldstein, Henry Apfelbaum, Russell L. Woods, Robert Giorgi, Eli Peli, James Barabas, ...
This paper describes a system for tracking the Line of Primary Gaze (LoPG) of subjects as they view a large projection screen. LoPG is monitored using a magnetic head tracker and a tracking...
Eli Peli, Jian Yang, Robert Goldstein, Adam Reeves
Perceived contrast was measured under natural viewing conditions with the use of contrast-matching and magnitude-estimation paradigms and found to be independent of luminance over a range of...
An augmented-vision device for patients with severely restricted peripheral visual field (tunnel vision) was proposed, combining a see-through HMD and minified contour detection. Implemented...
dichoptic presentation, and length (2007)
Suprathreshold contrast perception across differences
eli's abstract TREATING HEMIANOPIA USING PRISMS TO CREATE PERIPHERAL DIPLOPIA (2007)
Most optical aids for hemianopia provide only field relocation while field expansion is the desired effect and thus, these aids are rarely successful. This paper describes a novel method for prism...
Appearance of images through a multifocal intraocular lens (2007)
The appearance of images through a multifocal intraocular lens (IOL) was simulated. The optical transfer function (OTF) of a model eye containing the multifocal lens was measured and divided by the...
In a previous study the simulation of image appearance from different distances was shown to be effective1. The simulated observation distance accurately predicted the distance at which the simulated...
Abstract Lateral interactions: size does matter q (2007)
Russell L. Woods, Alex K. Nugent, Eli Peli
Usually a high-contrast, co-local mask increases contrast threshold (inhibition). Interestingly, a laterally displaced mask (flanker)
Eli Peli, Msc Od, The Schepens Eye, The Schepens Eye
faculty/peli/index.html Low vision driving in the USA: who, where, when, and why
VALIDATION AND VERIFICATION OF A VISUAL MODEL FOR CENTRAL AND PERIPHERAL VISION (2007)
Many computational visual models use the contrast sensitivity function (CSF) to represent certain visual characteristics of the observer. In addition, these models are often implemented using a...
2032 Reprinted from Journal of the Optical Society of America A Contrast in complex images 7 (2007)
The physical contrast of simple images such as sinusoidal gratings or a single patch of light on a uniform background is well defined and agrees with the perceived contrast, but this is not so for...
An augmented vision see-through HMD, which displays a minified contour view of the real world over the residual visual field of tunnel vision patients, was evaluated in a visual search experiment....
Lateral Interactions in Peripheral Vision Vary Between (2007)
Spatial And Temporal, Robert G. Giorgi, Russell L. Woods, Eli Peli
this paper examines. The second question, namely, which of the paradigms (if any) portrays the actual threshold, is more relevant but also more difficult to address, and it may well be that the...
Virtual reality locomotion simulators are a promising tool for evaluating the effectiveness of vision aids to mobility for people with low vision. This study examined two factors to gain insight into...
Eye movements of patients with tunnel vision while walking (2006)
PURPOSE. To determine how severe peripheral field loss (PFL) affects the dispersion of eye movements relative to the head in patients walking in real environments. This information should help to...
Use of an augmented-vision device for visual search by patients with tunnel vision (2006)
PURPOSE. To study the effect of an augmented-vision device that superimposes minified contour images over natural vision on visual search performance of patients with tunnel vision. METHODS. Twelve...
Alex R. Bowers, Doris H. Apfelbaum, Eli Peli
PURPOSE. Visually impaired people are permitted to use bioptic telescopes for driving in many states in the United States. However, it has been suggested that the telescope is used only to meet the...
Recognition performance and perceived (2005)
quality of video enhanced for the visually impaired
Registration of an on-axis see-through head mounted display and camera system (2005)
Gang Luo, Noa Rensing, Evan Weststrate, Eli Peli, Member Spie
Abstract. An optical see-through head-mounted display (HMD) system integrating a miniature camera that is aligned with the user’s pupil is developed and tested. Such an HMD system has a potential...
Wideband Enhancement of Television Images for People with Visual Impairments (2004)
Eli Peli, Jeonghoon Kim, Yitzhak Yitzhaky, Robert B. Goldstein, Russell L. Woods
INTRODUCTION A growing number of people suffer from visual impairments. These impairments and the resulting disabilities greatly affect the quality of life of many older, otherwise healthy people....
MPEG-based image enhancement for the visually impaired (2004)
Jeonghoon Kim, Avni Vora, Eli Peli, Member Spie
An MPEG-based image contrast enhancement algorithm for people with low vision is presented. Contrast enhancement is achieved by modifying the inter- and intra-quantization matrices in the MPEG...
Gang Luo, Noa M. Rensing, Gang Luo Phd, Eli Peli, ...
We carried out an evaluation of the first prototype (LV-3) of a new night vision device, which incorporates visual field expansion through minification (Minified AugmentedView) , to provide feedback...
Tracking the line of primary gaze in a walking simulator: modeling and calibration (2004)
James Barabas, Robert B. Goldstein, Henry Apfelbaum, Russell L. Woods, Robert G. Giorgi, Eli Peli
This article describes a system for tracking the line of primary gaze (LoPG) of participants as they view a large projection screen. Using a magnetic head tracker and a tracking algorithm, we find...
Image Enhancement Using a Contrast Measure in the Compressed Domain (2003)
Jinshan Tang, Eli Peli, Scott Acton, Senior Member, Senior Member
An image enhancement algorithm for images compressed using the JPEG standard is presented. The algorithm is based on a contrast measure defined within the discrete cosine transform (DCT) domain. The...
The Optical Functional Advantages of an Intraocular Low-Vision Telescope (2002)
An implantable miniaturized telescope (IMT) for low vision has recently been developed. Surgically inserted into only one eye of patients with bilateral central visual loss, the IMT provides a...
Image enhancement in JPEG domain for lowvision patients,’’ SID’02 (2002)
An image enhancement algorithm for low-vision television viewing was developed. The algorithm enhances the images in the JPEG/MPEG domain by weighting the quantization table. The advantages of our...
Alex K. Nugent, Rajesh N. Keswani, Russell L. Woods, Eli Peli
www.elsevier.com/locate/visres
Feature detection algorithm based on a visual system model (2002)
An algorithm for the detection of visually relevant luminance features is presented. The algorithm is motivated and directed by current models of the visual system. The algorithm detects edges (sharp...
Validation and Verification of a Visual Model for Central and Peripheral Vision (2001)
Many computational visual models use the contrast sensitivity function (CSF) to represent certain visual characteristics of the observer. In addition, these models are often implemented using a...
Methods for Improving Depth Perception in HMDS (2001)
Fischer, Robert E., Reiley, Daniel J., Pope, Charles, Peli, Eli
Head mounted display systems typically present imagery to the user focused either at infinity (collimated light into the eyes), or alternatively at some nominal finite distance in the order of 11-18...
Contrast sensitivity function and image discrimination (2001)
A previous study tested the validity of simulations of the appearance of a natural image (from different observation distances) generated by using a visual model and contrast sensitivity functions of...
Intrasaccadic perception’, The (2001)
Mammalian vision has a lowpass frequency characteristic that filters out fast temporal oscillations. Thus, fast-drifting gratings cannot be detected with static eyes, but the same gratings can easily...
Luminance artifacts of cathode-ray tube displays for vision research (2001)
Abstract—Phosphor persistence, video bandwidth, DC restoration and high-voltage regulation affect the appearance of images presented on cathode-ray tubes (CRTs), potentially resulting in...
Recognition of jagged (pixelated) letters in (2001)
Li Li, Alex K. Ncigent, Eli Peli
Abstract Previous studies found that for a group of mixed low vision observers, letter counting with smooth (anti-aliased) letters was better than with jagged (pixelated) letters on a CRT display...
Implantable miniaturized telescope (IMT) for low vision (2000)
Eli Peli, Isaac Lipshitz, Gideon Dotan
VisionCare has developed and tested the first Implantable Miniaturized Telescope (IMT) for low vision. A small optical device with a configuration of a Galilean telescope is implanted in place of the...
Integrated Color Coding and Monochrome Multi-Spectral Fusion (1998)
Peli, Tamar, Ellis, Ken, Stahl, Robert, Peli, Eli
This paper describes a new integrated color coding and a contrast-based monochromatic fusion process. The fusion process is aimed for on board real time application and it is based on practical and...
of desk-top computer display
Eli Peli, Elisabeth M. Fine, Angela T. Labianca
The contrast detection thresholds for Gabor patches, as a function of speed, oscillated by as much as a log unit when the motion was orthogonal to the orientation of the Gabor. Sensitivity was...
Imputation of direction of motion in one (1998)
Under many conditions below the Nyquist limit, a drifting grating briefly displayed on a CRT is consistently perceived as moving in the opposite direction. Taking into account the sample-and-hold...
Test of a model of foveal vision by using simulations (1996)
The appearance of four different images from three different distances was simulated by using the individual contrast sensitivity functions (CSF’s) of normally sighted observers. The simulations...
Eli Peli, Lawrence Arend, Angela T. Labianca
perception across changes in luminance
Enhancement of text for the visually impaired (1995)
Previous research has established the benefits of image enhancement by spatial filtering for face perception and motion video appreciation among elderly low-vision observers [Invest. Ophthalmol. Vis....
Fiber-optic reading magnifiers for the visually impaired (1995)
We describe fiber-optic stand magnifiers specifically designed for use as low-vision reading aids. Application of this technology results in better optical and ergonomic properties. The fiber-optic...
Visually impaired observers read dynamically displayed text faster than text displayed in a normal page view. The goal of this study was to compare reading rates from two dynamic-presentation methods...
Display nonlinearity in digital image processing for visual communications (1992)
visual communications
peripheral contrast thresholds (1990)
Eli Peli, Jian Yang, Robert B. Goldstein
Image invariance with changes in size: the role of
Visual issues in the used of a head mounted monocular display (1990)
Abstract. A miniature display device, recently available commercially, is aimed at providing a portable, inexpensive means of visual information communication. The display is head mounted in front of...
Contrast in complex images (1990)
The physical contrast of simple images such as sinusoidal gratings or a single patch of light on a uniform background is well defined and agrees with the perceived contrast, but this is not so for...
HyperTalk Language Reference Manual Addison-Wesley (1988)
In order to test a model of peripheral vision, various contrast sensitivity functions (CSF’s) and fundamental eccentricity constants (FEC’s) [see J. Opt. Soc. Am. A 8, 1762 (1991)] were applied...
Zebehazy, Kim T., Zimmerman, George J., Bowers, Alex R., Luo, Gang, Peli, Eli
In preparation for an evaluation of night vision devices, an exploratory study was conducted to gain initial experience with the sensitivity of chosen mobility measures under night conditions. The...
Recognition Performance and Perceived Quality of Video Enhanced for the Visually Impaired
Subjects with central field loss (CFL) individually selected enhancement parameters to improve visibility of static video images. The effect of enhancement on performance and on perceived quality of...