Gesture recognition using neural networks

Abstract

An apparatus, method, and a computer program is provided for gesture recognition using neural networks. An initial point is recorded when a user presses a finger on a screen. Subsequent points are recorded and an angle is calculated from point to point as the user periodically moves the finger. A set of the calculated angles are compared with an ideal angle in order to recognize the gesture.

1 . A computer-implemented method, comprising:
 recording an initial point when a user presses a finger on a screen;   calculating an angle from the initial point to one or more other points as the user moves the finger; and   when it is determined that the user's finger is removed from the screen, comparing each of the calculated angles with corresponding ideal angles in order to recognize a gesture;   wherein recognizing the gesture comprises:
 iterating through a table to determine two points that are closest to each other when a plurality of points exceeds a threshold number; 
 calculating a geometric center value of the two points, replacing the first point with the value and deleting the second point; and 
 repeating the iteration and replacing until the plurality of points is reduced to the threshold number. 
   
     
     
         2 . The computer-implemented method of  claim 1 , further comprising determining an overall error for each possibility based on the comparing of each of the calculated angles. 
     
     
         3 . The computer-implemented method of  claim 1 , further comprising, based on the comparing of each of the calculated angles, selecting the calculated angles with the lowest error to be the correct gesture. 
     
     
         4 . The computer implemented method of  claim 1 , wherein the screen comprises a resistive touch panel overlay. 
     
     
         5 . The computer implemented method of  claim 1 , further comprising:
 iterating through a table to determine two points that are furthest away from each other when the plurality of points are below a minimum number of points; and   interpolating a new point between the two points.   
     
     
         6 . The computer-implemented method of  claim 1 , further comprising, when the plurality of points are below a minimum number of points, calculating a simple line when a maximum distance between two of the plurality of points exceeds a threshold number. 
     
     
         7 . The computer-implemented method of  claim 1 , wherein the screen can only record a single point at a time. 
     
     
         8 . An apparatus, comprising:
 a processor; and   memory configured to store an application,   wherein the application, when executed, is configured to cause the processor to:
 record an initial point when a user presses a finger on a screen; 
 calculate an angle from the initial point to one or more other points as the user moves the finger; and 
 when it is determined that the user's finger is removed from the screen, compare each of the calculated angles with corresponding ideal angles in order to recognize a gesture; 
 wherein the processor is further configured to:
 iterate through a table to determine two points that are closest to each other when a plurality of points exceeds a threshold number; 
 calculate a geometric center value of the two points, replacing the first point with the value and deleting the second point; and 
 repeat the iteration and replacing until the plurality of points is reduced to the threshold number. 
 
   
     
     
         9 . The apparatus of  claim 8 , wherein the application is further configured to cause the processor to determine an overall error for each possibility based on the comparing of each of the calculated angles. 
     
     
         10 . The apparatus of  claim 8 , wherein the application is further configured to cause the processor to, based on the comparing of each of the calculated angles, select the calculated angles with the lowest error to be the correct gesture. 
     
     
         11 . The apparatus of  claim 8 , wherein the screen comprises a resistive touch panel overlay. 
     
     
         12 . The apparatus of  claim 8 , wherein the application is further configured to cause the processor to:
 iterate through a table to determine two points that are furthest away from each other when a plurality of points is below a minimum number of points; and   interpolate a new point between the two points.   
     
     
         13 . The apparatus of  claim 8 , wherein the application is further configured to cause the processor to, when the plurality of points is below a minimum number of points, calculate a simple line when a maximum distance between two of the plurality of points exceeds a threshold number. 
     
     
         14 . The apparatus of  claim 8 , wherein the screen can only record a single point at a time. 
     
     
         15 . A computer program, embodied on a non-transitory computer-readable medium, the computer program, when executed, configured to cause a processor to:
 record an initial point when a user presses a finger on a screen;   calculate an angle from the initial point to one or more other points as the user moves the finger; and   when it is determined that the user's finger is removed from the screen,   compare each of the calculated angles with corresponding ideal angles in order to recognize a gesture;   iterate through a table to determine two points that are closest to each other when a plurality of points exceeds a threshold number;   calculate a geometric center value of the two points, replacing the first point with the value and deleting the second point; and   repeat the iteration and replacing until the plurality of points is reduced to the threshold number.   
     
     
         16 . The computer program of  claim 15 , wherein the computer program is further configured to cause the processor to determine an overall error for each possibility based on the comparing of each of the calculated angles. 
     
     
         17 . The computer program of  claim 15 , wherein the computer program is further configured to cause the processor to, based on the comparing of each of the calculated angles, select the calculated angles with the lowest error to be the correct gesture. 
     
     
         18 . The computer program of  claim 15 , wherein the screen comprises a resistive touch panel overlay. 
     
     
         19 . The computer program of  claim 15 , wherein the computer program is further configured to cause the processor to:
 iterate through a table to determine two points that are furthest away from each other when a plurality of points is below a minimum number of points; and   interpolate a new point between the two points.   
     
     
         20 . The computer program of  claim 15 , wherein the computer program is further configured to cause the processor to, when the plurality of points are below a minimum number of points, calculate a simple line when maximum distance between two of the plurality of points exceeds a threshold number.