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Gesture recognition refers to the mathematical interpretation of human motions using a computing device. It is a component of perceptual user interface (PUI). Other popular PUI components are voice recognition, facial recognition, lip movement recognition and eye tracking. Gestures could possibly come from any state or bodily motion; however, they usually originate from the hands or face. At present, gesture recognition is mainly centered on hand-gesture recognition and facial emotion recognition.
In gesture recognition, the human body's motions are read by a camera and the captured data is sent to a computer. The computer then makes use of this data as input to handle applications or devices.
Gesture recognition may also be referred to as gesture control.
Gesture recognition helps computers to understand human body language. This helps to build a more potent link between humans and machines, rather than just the basic text user interfaces or graphical user interfaces (GUIs). These old-fashioned input methods still limit all inputs to mouse and keyboard.
Using gesture recognition, human-machine interactions (HMIs) can be interpreted without the help of any mechanical device. For example, the concept of gesture recognition may be used to move a cursor just by pointing and directing a finger at the computer screen. The potential benefits offered by gesture recognition technology may make standard input devices like the keyboard, mouse and even touch-screen obsolete.
Recognizing gestures as input can be very helpful for physically-impaired persons. In addition, gesture recognition triggers better, more natural interaction for a 3-D virtual world or a gaming environment.
Using a controller with gyroscopes and accelerometers, the gestures of the body and hands can be increased to sense rotation and tilting, as well as movement acceleration. Contrary to haptic interfaces, gesture recognition technology does not demand that the user sport any specific gear or device. The body gestures are read by a camera rather than sensors installed on a device.