26-02-2013, 04:22 PM
Finger Tracking In Real Time Human Computer Interaction
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Introduction:
The finger tracking system is focused on user-data interaction, where the user interacts with virtual data, by handling through the fingers the volumetric of a 3D object that we want to represent. This system was born based on the human-computer interaction problem. The objective is to allow the communication between them and the use of gestures and hand movements to be more intuitive, Finger tracking systems have been created. These systems track in real time the position in 3D and 2D of the orientation of the fingers of each marker and use the intuitive hand movements and gestures to interact.
Definition
Finger-tracking is usage of bare hand to operate a computer in order to make human-computer interaction much more faster and easier.
Fingertip finding deals with extraction of information from hand features and positions. In this method we use the position and direction of the fingers in order to get the required segmented region of interest.
Finger pointing systems aim to replace pointing and clicking devices like the mouse with the bare hand. These applications require a robust localization of the fingertip plus the recognition of a limited number of hand postures for “clicking-commands”.
Finger-tracking systems are considered as specialized type of hand posture/gesture recognition system.
The typical Specializations are:
1) Only the most simple hand postures and recognized.
2) The hand usually covers a part of the on screen.
3) The finger positions are being found in real-time
4) Ideally, the system works with all kinds of backgrounds
5) The system does not restrict the speed of hand movements
In finger –tracking systems except that the real-time constraints currently do not allow sophisticated approaches such as 3D-model matching or Gabor wavelets.
Method :
1.Color Tracking Systems
2.Correlation Tracking Systems
3.Contour -Based Tracking Systems
4.Finger Finding
Finger Mouse:
The FingerMouse system makes it possible to control a standard11 mouse pointer with the bare hand. If the user moves an outstretched forefinger in front of the camera, the mouse pointer follows the finger in real-time. Keeping the finger in the same position for one second generates a single mouse click. An outstretched thumb invokes the double-click command; the mouse-wheel is activated
Types of tracking:
There are many options for the implementation of finger tracking. A great number of theses have been done in this field in order to make a global partition as an objective. We could divide this technique into finger tracking and interface. Regarding the last one, it computes a sequence estimation of the image which detects the hand part of the background. Regarding the first one, to carry out this tracking, we need an intermediate external device, used as a tool for executing different instructions.
Application:
Definitely, the finger tracking systems are used to represent a virtual reality. However its application has gone to professional level 3D modeling, companies and projects directly in this case overturned. Thus such systems rarely have been used in consumer applications due to its high price and complexity. In any case, the main objective is to facilitate the task of executing commands to the computer via natural language or interacting gesture.
The objective is centered on the following idea computers should be easier in terms of usage if there is a possibility to operate through natural language or gesture interaction. The main application of this technique is to highlight the 3D design and animation, where software like Maya and 3D StudioMax employ these kinds of tools. The reason is that is that allow a more accurate and simple control of the instructions that we want to execute. This technology offers many possibilities, where the sculpture, building and modeling in 3D in real time through the use of a computer is the most important