Patent ID: 8793621

Claim:
A method for touchless character recognition, comprising: detecting a first pause of a finger in a touchless sensory space at a first location; after the first pause, tracking a movement of the finger in the touchless sensory space; detecting a second pause of the finger in the touchless sensory space at a second location; after the second pause, creating a trace of the finger movement between the first pause and the second pause from the tracking; recognizing a pattern from the trace, wherein the pattern is an alphanumeric character or a finger gesture; presenting the pattern in response to the second pause at the second location; and consequently thereafter providing a finger gesture detection state to accept or reject the pattern, consisting of: detecting a returning movement of the finger from the second location upon release of the second pause to the first location of the trace coinciding with the first pause for accepting the pattern corresponding to the trace, detecting a finger discard action comprising a finger movement away from the first location for rejecting the pattern: and either accepting the pattern corresponding to the trace when the returning movement is detected towards and returns to the first location, or rejecting the pattern when the finger action is directed away from the first location.