The Conjuring Finger

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Name of the Innovation: The Conjuring Finger:

2 Name of the Innovation : The Conjuring Finger Team/ Individual name : Gen-X arrows. Members of the Team : Vishal Saini Mili Shah Richa Patel Aakanksha Jadhav Name of the college and city: St. Francis Institute Of Technology, Mumbai. Year/Batch: BE EXTC (2013-14).

Stage of Innovation:

3 Stage of Innovation Idea Prototype Established Scaling Idea : Touch interactions are typically limited to surfaces and devices that have been instrumented to sense user input. We propose to instrument the finger instead and present THE CONJURING FINGER, a small device worn on the finger tip which supports always available input. THE CONJURING FINGER is composed of a micro-camera and a optical flow sensor. This allows it to sense touch events and the material that it touches.


4 Innovation Chosen Industry : Public Services Chosen Technology : Mobility Summary of the Project : The Conjuring Finger inverts the typical relationship between the finger and an interactive surface. With Conjuring Finger, we instrument the user’s finger itself, rather than the surface it is touching. It senses touch through an optical mouse sensor, enabling any surface to act as a touch screen and also senses texture through micro RGB camera, allowing contextual actions to be carried out based on the particular surface being touched. We tried to implement a number of novel interaction techniques that leverage its unique capabilities.

Compelling need for the innovation:

5 Compelling need for the innovation The advanced sensing technologies used here will help to extend our ability to interact with computers and other electronic gadgets from anywhere. It is able to recognize textures and use the information to understand the environment or object the user is interacting with, and perform associated contextual actions. Furthermore, with Conjuring Finger, we explore a smaller form factor, and a rich interaction design space beyond cursor control. It proves to be a novel device that extends users touch capability to everyday objects.


6 Impact In order to explore the interaction design space we have described, we implemented few interaction techniques. Some of the interactions are novel while others show previously published technologies. PocketTouch Conjuring Finger can be used to remotely access or control mobile devices. Action of muting an incoming Skype call (command execution), and mapping this to touching a handbag. If the user receives an unwanted call when their Smartphone is in the handbag, the user can simply tap the handbag to mute the notification. This interaction is much like PocketTouch .


7 (Cont..) Skinput By recognizing skin as a texture, Magic Finger provides a method for using skin as an input surface, without requiring additional sensors. Pinching Finger to Thumb The finger to thumb pinch action has been shown to be a useful gesture for freehand input. A pinch can be mapped to a command execution of advancing slides in a presentation, as a replacement for holding a wireless presentation mouse. Data Matrix Buttons In addition to tapping environmental textures, users can also tap artificial ones. A grid of printed Data Matrix codes can be used as physical buttons. Codes on magazine articles with web pages can also be associated. Tapping the Data Matrix will open a URL associated with the article.


8 Implementation To achieve sensing of positional movements and sensing of material, our prototype uses two optical sensors. A low resolution high frame rate optical flow sensor is used to sense 2D finger movements, and a higher resolution, lower frame rate camera is used to sense material. Optical Flow Sensor This sensor is often used in optical mice, and is reliable on a large variety of surfaces. The sensor detects motion by examining the optical flow of the surface it is moving on. Micro RGB Camera To provide an enhanced scope of recognition, we use an NanoEye micro RGB camera. In comparison to the optical flow sensor, NanoEye has a higher resolution and smaller pixels, and thus captures more subtle details of textures.


9 (Cont..) Light Source In order for the camera and the optical flow sensor to function, an external light source is needed to illuminate the surface underneath it. We use a 5mm white LED, which has similar size and brightness with those used in optical mice. Physical From Conjuring Finger is affixed to the fingertip using an adjustable Velcro ring. A small plastic casing holds the components. Computer Interfacing The optical flow sensor and the LED will be connected to an Arduino UNO board, which facilitates communication with the computer, an HP Touch Smart Tm2 running Windows 7. The NanoEye is connected directly via USB. Tethering the device to a computer was an enabling technology for our prototype.

Competetive Advantage:

10 Competetive Advantage Accuracy levels indicate that Conjuring Finger would be able to distinguish a large number of both environmental and artificial textures, and consistently recognize Data Matrix codes. This demonstrates the feasibility of using a Conjuring Finger device for interactive tasks. The device size and the form factor is small enough to fit on a finger tip.

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