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TACTILE RENDERING FOR TOUCH
SURFACE IN A VIRTUAL SHOPPING
STORE
- RAJAT DHASMANA
- 1DS11IS069
Department of ISE,DSCE 1
Department of ISE,DSCE 2
( VIRTUAL STORE)
In Virtual Store smartphone users can photograph the bar code of
life-size pictu...
Department of ISE,DSCE 3
Problems Faced In Supermarket
Department of ISE,DSCE 4
How It Works
Department of ISE,DSCE 5
TOUCH SURFACE
Department of ISE,DSCE 6
What Is Haptics ?
 Haptics’ is derived from the Greek
word ‘haptikos’
which means – ‘being able ...
Department of ISE,DSCE 7
Haptics
Haptics is implemented through different type
of interactions with a haptic device
commun...
Department of ISE,DSCE 8
Tactile Feedback
Refers to the sensations felt by the skin.
It allows the user to feel things s...
Department of ISE,DSCE 9
Force Feedback
It reproduces the directional forces that can
result from solid boundaries.
E.g....
Department of ISE,DSCE 10
This technology takes advantage of the sense of
touch by applying forces, vibrations, or motion...
Department of ISE,DSCE 11
Tactile Rendering
Department of ISE,DSCE 12
What Is Rendering?
Rendering in a Computer Graphics is a Process
of generating an image from a 2...
Department of ISE,DSCE 13
TACTILE DISPLAY
Tactile Displays are based on :
 Electrovibration Effect
 Tactile Rendering Al...
Department of ISE,DSCE 14
Electrovibration
Traditional Electro-mechanical actuators Electrovibration Display
Department of ISE,DSCE 15
 In tactile displays based on an electrovibration effect the friction between
the sliding finge...
Department of ISE,DSCE 16
1) Calculate the gradient of the virtual surface we want to render
2) Determine the “dot product...
Department of ISE,DSCE 17
Rendering tactile bumps on touch screens
Resistive forces on the fingertip are proportional to
t...
Department of ISE,DSCE 18
APPLICATIONS
 Depth Maps
 Teleoperation or Telerobotics
 Computer Games
Department of ISE,DSCE 19
ADVANTAGES
Inexpensive
Lightweight
Generates rich and effective tactile sensations
for latera...
Department of ISE,DSCE 20
 Tactile Feedback interfaces can only exert
forces with limited magnitude and not equally
well ...
Department of ISE,DSCE 21
FUTURE VISION
1.Military Application
The soldiers can prepare themselves for battle from
learnin...
Department of ISE,DSCE 22
CONCLUSIONS
 Tactile-Rendering algorithm simulates geometric
features such as bumps on flat tou...
Department of ISE,DSCE 23
Any Queries
Thank You
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TACTILE RENDERING

Tactile Rendering For Touch Surface Using Principle of Electrovibration and Tactile Rendering Algorithm

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TACTILE RENDERING

  1. 1. TACTILE RENDERING FOR TOUCH SURFACE IN A VIRTUAL SHOPPING STORE - RAJAT DHASMANA - 1DS11IS069 Department of ISE,DSCE 1
  2. 2. Department of ISE,DSCE 2 ( VIRTUAL STORE) In Virtual Store smartphone users can photograph the bar code of life-size pictures, on the walls and platform screen doors, of 500 items of food, toiletries, electronics etc, for delivery within the same day.
  3. 3. Department of ISE,DSCE 3 Problems Faced In Supermarket
  4. 4. Department of ISE,DSCE 4 How It Works
  5. 5. Department of ISE,DSCE 5 TOUCH SURFACE
  6. 6. Department of ISE,DSCE 6 What Is Haptics ?  Haptics’ is derived from the Greek word ‘haptikos’ which means – ‘being able to come into contact’.  Haptics is the science of applying touch (tactile) sensation and control to interact with computer applications.
  7. 7. Department of ISE,DSCE 7 Haptics Haptics is implemented through different type of interactions with a haptic device communicating with the computer. These interactions can be categorized into the different types of touch sensations a user can receive: 1)Tactile Feedback 2)Force Feedback
  8. 8. Department of ISE,DSCE 8 Tactile Feedback Refers to the sensations felt by the skin. It allows the user to feel things such as the texture of surfaces, temperature and vibration.
  9. 9. Department of ISE,DSCE 9 Force Feedback It reproduces the directional forces that can result from solid boundaries. E.g. the weight of virtual objects, inertia, etc.
  10. 10. Department of ISE,DSCE 10 This technology takes advantage of the sense of touch by applying forces, vibrations, or motions to the user. IT gives people a sense of touch with computer- generated environments, so that when virtual objects are touched, they seem real and tangible. Tactile Rendering
  11. 11. Department of ISE,DSCE 11 Tactile Rendering
  12. 12. Department of ISE,DSCE 12 What Is Rendering? Rendering in a Computer Graphics is a Process of generating an image from a 2D or 3D model.
  13. 13. Department of ISE,DSCE 13 TACTILE DISPLAY Tactile Displays are based on :  Electrovibration Effect  Tactile Rendering Algorithm
  14. 14. Department of ISE,DSCE 14 Electrovibration Traditional Electro-mechanical actuators Electrovibration Display
  15. 15. Department of ISE,DSCE 15  In tactile displays based on an electrovibration effect the friction between the sliding finger and the touch screen is produced by injecting a periodic electrical signal into a conductive electrode coated with a thin dielectric layer.  The periodic signal creates an alternating electrostatic force that periodically attracts and releases the finger from the touch surface, producing friction- like rubbery sensations. Principle of Electrovibration
  16. 16. Department of ISE,DSCE 16 1) Calculate the gradient of the virtual surface we want to render 2) Determine the “dot product” of the gradient of the virtual surface and velocity of the sliding finger 3) Map the dot-product to the voltage and then the amplitude of the voltage that is injected into the tactile device. Tactile Rendering Algorithm PerceivedFriction
  17. 17. Department of ISE,DSCE 17 Rendering tactile bumps on touch screens Resistive forces on the fingertip are proportional to the local gradient of the geometric shape displayed on a touch screen, i.e., the steeper the bump – the higher the resistance forces felt on the finger.
  18. 18. Department of ISE,DSCE 18 APPLICATIONS  Depth Maps  Teleoperation or Telerobotics  Computer Games
  19. 19. Department of ISE,DSCE 19 ADVANTAGES Inexpensive Lightweight Generates rich and effective tactile sensations for lateral friction displays.
  20. 20. Department of ISE,DSCE 20  Tactile Feedback interfaces can only exert forces with limited magnitude and not equally well in all directions.  Rendering algorithms operate in discrete time whereas users operate in continuous time. LIMITATIONS
  21. 21. Department of ISE,DSCE 21 FUTURE VISION 1.Military Application The soldiers can prepare themselves for battle from learning how to defuse bomb to operating a helicopter. 2.Medical Application Use of a central workstation from which surgeons would perform operations in various locations; with machine setup and patient preparation performed by local nursing staff . 3. Textile Industry User could study and feel the texture and quality of material during the sale of cloth through internet.
  22. 22. Department of ISE,DSCE 22 CONCLUSIONS  Tactile-Rendering algorithm simulates geometric features such as bumps on flat touch surfaces using only lateral resistance forces produced by the electrovibration effect.  We can create a realistic and convincing tactile sensations of 3D bumps on a variety of visual content, including photos and 3D models. This functionality can be easily incorporated into touch- based interfaces and allow for the creation of effective and engaging tactile user experiences.
  23. 23. Department of ISE,DSCE 23 Any Queries Thank You

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