afb tech svd advisory board y2

8/6/2019 Afb Tech Svd Advisory Board y2

1/24

Small Visual Display ProjectNIDRR Grant

Caesar Eghtesadi and Morgan Blubaugh

AFB TECH, Huntington, WV

Optics Lab, Display Measurements,and Database 2ndYear Progress

Report


2/24

Presentation Outline

Y2 NIDRR Grant ObjectivesOptics Lab, Display Measurement, and Database

Technical Resources

Y2 Achievements

Optics Lab

Measurements Test Procedures

Instrumentations

Software & Hardware

Analysis & Computations

DatabaseDissemination of Information

Future Work

Display Demonstration Center


3/24

Year 2 NIDRR Grant ObjectivesOptics Lab, Display Measurements, and Database

a) Optical Measurement Capabilities

I. Develop Capability to Measure Glare

II. Design & Develop Software Shell

III. Enhance instrumentation capabilities

IV. Develop System DocumentationV. Develop Instructional Manual for Low Vision Operator

b) SVD Database

a) Acquire 130 SVD devices

b) Conduct optical measurementsc) Populate Database

c) Disseminate Findings


4/24

Technical Resources

AFB Team Mark Uslan Morgan Blubaugh

Lee Huffman

Ike Presley

William Reuschel (Intern)

Consulting Team Caesar Eghtesadi, Ph.D

Vic Baker, Ph.D

Ron Schuchard, Ph.D

Jack Smith, Ph.D (Marshall University)

Subject Matter Experts Edward Kelley, Ph.D

Well known independent consultant in Optical Measurement

Mark Fairchild, Ph.D Munsell Color Science Laboratory, Rochester Institute of Technology

Significant knowledge & expertise in Image Quality Analysis


5/24

Optics Lab Configurations

Previous Setup (May 2010)

Current Setup (May 2011)

Upgraded PC

Stray Light Elimination Tube RAID Backup

PC Communication with allInstrumentation

Uniform Light Display


6/24

2ndYear Achievements Optics Lab

New/Improved Measurements Procedure Reflection

Contrast

MTF

MTF (alternative)

Software Developed internally:

Software Shell

Purchased MaxIM DL Adobe CS

MS Visual Studio

Hardware Stray Light Elimination Tube

Upgraded Dedicated PC

RAID Backup


7/24

Reflection

Two types of reflection Specular (Mirror-like)

Diffuse (Paper-like)

Dependent on: Type of Covering

Emissive or Reflective

Brightness of Display

Used to calculate contrast,Sunlight Visibility

Specular Reflection

Diffuse Reflection


8/24

Reflection & Contrast

Contrast is directly relatedto amount of ambient light

With reflectance factors,

contrast can be calculatedfor any illuminance level

Contrast MeasurementsDarkroom

Diffuse

Specular

Contrast Ratio &Michelson Contrast

Diffuse

Specular


9/24

Data Table

Product Contrast Ratio Michelson Contrast

Darkroom Sunlight(Diffuse)

Sunlight(Specular)

Darkroom Sunlight(Diffuse)

Sunlight(Specular)

OneTouch

BGM

N/A 16.87 2.06 N/A 93.60% 35.75%

SamsungIntensity

279.35 1.97 1.25 99.29% 32.68% 10.98%

iPod Touch 350.31 133.96 3.63 99.43% 98.52% 56.83%

Kindle 3 N/A 3.82 3.44 N/A 58.67% 54.16%

HoneywellThermostat

N/A 2.33 1.57 N/A 39.91% 22.27%


10/24

Modulation Transfer Function (MTF)

Significant activities to analyze and compute MTFaccurately Hired Professor Fairchild to advise and inspect our

procedures and results

Developed alternative approach to compute MTF Computed MTF with two approaches

Selected 6 display, tested, and send them to Ron withboth MTF results

MTF Computation Conventional Approach

Alternative Approach


11/24

MTF (Conventional Approach)

The red box

is the

frequencyrange that

we are

interested in

Uses Imatest

software suite

Takes a FFT of a

single characteredge to generate

the MTF

Measures what thescreen is capable

of producing


12/24

Alternate MTF

Part of the Software

Shell using MATLAB

Takes an FFT of an

entire row ofcharacters to

generate the MTF

Measures what thescreen actually

produces


13/24

Display Standard

Objective: To Develop An Display QualityMetric for Evaluating SVDs

The Palo Alto VA is evaluating the Barten

SQRI as a valid display metric

SQRI uses MTF with the Contrast SensitivityFunction (CSF) to value display accessibility

Following the study, the SQRI will be usedas the primary display characteristic in theSVD database


14/24

Software Shell

Current build of

Software Shell can:

Interface with all

instrumentationManage calibrations

Take measurements

with limited user

interactionUpload results to

database


15/24

Databases

Internal Database

Will store all measurement data, including photos

Automatically calculates display metrics

Accessible only to Optics Lab Team

AFB Database

Database will be hosted on AFBs website tocompliment existing Product Database

Two-part design for Consumers and Manufacturers


16/24

Database Development

71 displays in the Database

Measurement Fields:

Product Information

Display Parameters

Contrast and Reflection

Factors

Calibration Data

AFB Database to be

launched by June 30


17/24

Dissemination

Ergonomics In Design Journal Title: Improving Accessibility of Small Visual Displays

for People with Vision Loss

Status: In final editing, will be submitted by end of May

Journal of the Society for Information Display Title: Character-Contrast Measurements on Reflective Displays

Status: Work in progress, will be submitted by end of May

Josephine L. Taylor Leadership Institute

Title: AFB Works to Improve Small Visual Displays Status: Presentation given in March, 2011

Assistive Technology Industry Association Convention Working Title: AFB Works to Improve Small Visual Displays

Status: Presentation submitted for January 2012 Convention


18/24

Future Work

First Priority: Work with Ron to develop an SVDStandard and implement it into Optics Lab measurements

Complete, finalize & document Optics Lab measurements

Acquire 120 additional SVD products

Conduct measurements and populate Database

Complete testing and documentation of the Database(both internally & externally)

Disseminate Findings

ATIA Conference

Papers publication at EID and SID Journal

Poster presentation at HEFS Conference


19/24

Display Demonstration Center (DDC)

Create a portable DDC to demonstrate SVDs used in commonconsumer products (7 to 10 products)

DDC will be an integral part and a complement to the Optics Lab

Emphasis on displays used in health care products , cell phone,thermostat, eBook (Kindle)

A broad representation of the variety of display technologies thatrepresent the best in its class

Use actual isolated display components separated from their productapplications. These displays are driven by PCs or dedicatedmicrocontrollers. Using actual display components rather than using

devices: Displays can be controlled and optimized for display quality

characteristics.

Flexible to upgrade the portable DDC by introducing the latest displaytechnology.


20/24

DDC - Progress Report

Assembled design and development team which includesHuman Factor and Industrial Engineer consultants

Completed Conceptual Design

Selected devices and display technologies

Display Technology Typical Product

Direct driven segmented LCD Honeywell Touchscreen Programmable Thermostat

Direct driven segmented LCD (Large

Font)

Omron HEM-780 Automatic Blood Pressure Monitor

Passive matrix STN (no backlight) One Touch Ultra 2 Blood Glucose Monitor

Passive matrix STN (LED Backlight) One Touch Ultra 2 Blood Glucose Monitor

OLED Bayer7393 Contour Usb Blood Glucose Monitor

OLED OneTouch Ping Insulin Pump

Active matrix TN LCD Samsung Intensity SCH-U450 Phone

IPS LCD iPod Touch (3rd Generation)

e-Ink Amazon Kindle (Latest Generation)

Vacuum fluorescent GE 1.1 cu. ft. Microwave Oven


21/24

DDC Packaging Design


22/24

DDC Packaging Configuration


23/24

DDC - Front Panel


24/24

Questions

afb tech svd advisory board y2

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