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Take out your mobile phone,

dial a number,

but imagine you are blind.

Take out your mobile phone,

but imagine you are blind.

Krajnc E., Knoll M., Feiner J., Traar M.

And you don’t have

physical keys


A Touch Sensitive User Interface Approach onSmartphones for Visually Impaired and BlindPersons

Elmar Krajnc, Mathias Knoll, Johannes Feiner, Mario TraarUSAB 2011, 25.-26. November 2011, Graz

A Touch Sensitive User Interface Approach onSmartphones for Visually Impaired and Blind

Elmar Krajnc, Mathias Knoll, Johannes Feiner, Mario Traar


26. November 2011, Graz

Project Ways4all Completewww.ways4all.at

� Routing and way finding

� Indoor navigation

� Communication with public transport vehicles

� Integration in one device, a mobile phone� Integration in one device, a mobile phone

� This paper: a barrier free UI for Touch Screen Phones

Project Ways4all Complete

Communication with public transport vehicles

Integration in one device, a mobile phone


Integration in one device, a mobile phone

This paper: a barrier free UI for Touch Screen Phones

Mobile Phone Market

� Smart Phones overtakes Mobile � Smart Phones overtakes Mobile Phones

� Android: 52.5% of theglobal smartphoneglobal smartphonemarket

http://articles.businessinsider.com/2011

Mobile Phone Market

Smart Phones overtakes Mobile Smart Phones overtakes Mobile

52.5% of theglobal smartphone


global smartphone

http://articles.businessinsider.com/2011-11-15/tech/30400572_1_smartphone-android-ios

Accessibilty on Smart Phones

� Mostly Touchscreens � Mostly Touchscreens

� No Standards

� Examples

� Symbian - Talks

� Apple - Voice Over � Apple - Voice Over

� Android

� Talkback/Eyes Free Project/Self Voicing Apps

Accessibilty on Smart Phones

Mostly Touchscreens Mostly Touchscreens


Talkback/Eyes Free Project/Self Voicing Apps

Previous Result

� Previous Version of the application� Previous Version of the application

� Java ME platform

� Screen reader Talks

� Transfer to Touchscreen

Previous Version of the applicationPrevious Version of the application

Screen reader Talks


Transfer to Touchscreen

� General Concept

Ways4all App on Android

� General Concept

� Android

� Open Source

� Developer Friendly

� Built in TTS Engine� Built in TTS Engine

Ways4all App on Android


� New View Componet

UI Talking View

� New View Componet

� Handling Touch Input

� Self Voicing

if ((touchEvent() … ){

tts.speak(itemTexts[0],… );tts.speak(itemTexts[0],… );

}

New View ComponetNew View Componet

Handling Touch Input


� Gestures API

Gesture Input

� Gestures API

� Writing or Gestures as User Input

… GestureLibraries.fromRawResource(this, … GestureLibraries.fromRawResource(this,

R.raw.myGestures);

…

predictions = … recognize(gesture);

if (prediction.name.equals(“3")) {

doSomeThing();

}

Writing or Gestures as

… GestureLibraries.fromRawResource(this,


… GestureLibraries.fromRawResource(this,

� Video or Demo

Talking User Interface

� Video or Demo

Talking User Interface


� Thinking Aloud Test

Usability Testing

� Thinking Aloud Test

� 7 Testuser

� 2 Blind, 2 Visual Disorder

� Feedback� Feedback

� Intuitive UI

� Users could fullfil most Tasks

Thinking Aloud TestThinking Aloud Test

Disorder, 3 Normal


Users could fullfil most Tasks

� Accessible Apps vs. Accessible

General Problems on Smartphones

� Accessible Apps vs. Accessible Smartphones

� 2D Touchscreen vs. 1D Lists

� No Standards

� Different Usage on Different Platforms� Different Usage on Different Platforms

Accessible Apps vs. Accessible

General Problems on Smartphones

Accessible Apps vs. Accessible

2D Touchscreen vs. 1D Lists

Different Usage on Different Platforms


Different Usage on Different Platforms

Outlook

� SW Development is in progress� SW Development is in progress

� Text input

� More reviews and tests

� Converting to other platforms like iPhone

SW Development is in progressSW Development is in progress

More reviews and tests

Converting to other platforms like iPhone


Conclusion

� Developing for special user groups is � Developing for special user groups is challenging

� New technologies needs new SolutionsSolutions

Developing for special user groups is Developing for special user groups is

New technologies needs new


Thanks for your Attention

Elmar Krajncelmar.krajnc@fh

Mathias KnollMathias.knoll@fh

Johannes Feinerjohannes.feiner@fh

Mario TraarMario Traarmario.traar@fh

FH JOANNEUMUniversity of Applied

www.fh-joanneum.at/itm

Thanks for your Attention

Elmar [email protected]

Mathias [email protected]

Johannes [email protected]

Mario Traar


Mario [email protected]

FH JOANNEUMApplied Sciences

joanneum.at/itm

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