LinkedIn emplea cookies para mejorar la funcionalidad y el rendimiento de nuestro sitio web, así como para ofrecer publicidad relevante. Si continúas navegando por ese sitio web, aceptas el uso de cookies. Consulta nuestras Condiciones de uso y nuestra Política de privacidad para más información.
LinkedIn emplea cookies para mejorar la funcionalidad y el rendimiento de nuestro sitio web, así como para ofrecer publicidad relevante. Si continúas navegando por ese sitio web, aceptas el uso de cookies. Consulta nuestra Política de privacidad y nuestras Condiciones de uso para más información.
TACTILE RENDERING FOR TOUCH
SURFACE IN A VIRTUAL SHOPPING
- RAJAT DHASMANA
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 pictures, on the walls and platform screen doors, of 500
items of food, toiletries, electronics etc, for delivery within the
Department of ISE,DSCE 3
Problems Faced In Supermarket
Department of ISE,DSCE 6
What Is Haptics ?
Haptics’ is derived from the Greek
which means – ‘being able to come
Haptics is the science of applying
touch (tactile) sensation and
control to interact with computer
Department of ISE,DSCE 7
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:
Department of ISE,DSCE 8
Refers to the sensations felt by the skin.
It allows the user to feel things such as the
texture of surfaces, temperature and vibration.
Department of ISE,DSCE 9
It reproduces the directional forces that can
result from solid boundaries.
E.g. the weight of virtual objects, inertia,
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.
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.
Department of ISE,DSCE 13
Tactile Displays are based on :
Tactile Rendering Algorithm
Department of ISE,DSCE 14
Traditional Electro-mechanical actuators Electrovibration Display
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
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
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
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.
Department of ISE,DSCE 18
Teleoperation or Telerobotics
Department of ISE,DSCE 19
Generates rich and effective tactile sensations
for lateral friction displays.
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.
Department of ISE,DSCE 21
The soldiers can prepare themselves for battle from
learning how to defuse bomb to operating a helicopter.
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.
Department of ISE,DSCE 22
Tactile-Rendering algorithm simulates geometric
features such as bumps on flat touch surfaces using
only lateral resistance forces produced by the
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.
Department of ISE,DSCE 23