Method and system for recognizing confirmation type touch gesture by touch terminal
The present invention relates to touch technology and provides a method and a system for recognizing a confirmation type touch gesture by a touch terminal. The method includes step A of further determining whether a vibration signal indicative of an occurrence of the confirmation type touch gesture is detected when the touch terminal detects a valid touch event on a touch screen, and step B of recognizing the valid touch event as a true confirmation type touch gesture if the determination result of step A is yes. The present invention has the following advantages: when detecting a valid touch event, the present invention further determines whether there is a suggestive vibration signal associated with the touch gesture operation. Only when both the touch event and vibration signal are detected, the valid touch event is considered as the true confirmation type touch gesture operation. Therefore, the recognition result is more reliable.
1. A method for recognizing an intended touch on a touch terminal, comprising:
Step I: detecting at least one touch event at a first time;
Step II: after step I, examining at a second time later than the first time whether a vibration signal which meets a preset characteristic condition is detected within a period of time; and
Step III: recognizing the valid touch event as the intended touch when the determination result of step II is yes,
wherein the step II comprises: presetting an amplitude threshold of the vibration signal;
presetting a number threshold of sampling points of the vibration signal;
calculating a total number of sampling points with amplitude beyond the amplitude threshold; and
when the total number of the beyond-threshold sampling points exceeds the number threshold, determining the intensity of the vibration signal meets the intensity condition,
wherein the touch event is caused by a touch and the vibration signal is caused by a tap, the touch and the tap occur at different positions, and
wherein a position of the tap is outside the touch screen.
2. The method of claim 1 , wherein the period of time set at step II is a continuous period, initiating at a third time prior to the first time and ending at the second time.
3. The method of claim 2 , wherein the third time is prior to the first time with an interval less than 50 ms.
4. The method of claim 3 , wherein the second time is later than the first time with an interval less than 50 ms.
5. The method of claim 1 , wherein the step II comprises: determining whether an intensity of the vibration signal meets an intensity condition preset in the touch terminal.
6. The method of claim 5 , wherein the step II further comprises:
when the intensity of the vibration signal meets the intensity condition, comparing characteristic index parameters of the vibration signal and a reference vibration signal; and
determining whether the vibration signal and the reference vibration signal meet a similarity or correlation coefficient threshold condition preset in the touch terminal.
7. The method of claim 6 , wherein the characteristic index parameters comprise frequency-domain parameters and time-domain parameters.
8. The method of claim 1 , wherein the touch event detection and the vibration signal are caused by a finger tap on a touch panel of the touch terminal.
9. A system for recognizing an intended touch on a touch screen of a touch terminal, comprising:
a touch sensor mounted within the touch terminal and detecting a touch event;
a vibration sensor mounted within the touch terminal and detecting a vibration signal; and
a recognition unit mounted within the touch terminal;
wherein the recognition unit is configured to determine whether the vibration signal is detected within a period of time initiating at a first time prior to the time when the touch event is detected and ending at a second time later than the time when the touch event is detected, and determine whether the vibration signal meets a characteristic condition preset in the touch terminal and recognize the touch as the intended touch when the vibration signal meets the characteristic condition,
wherein the recognition unit is further configured to calculate a total number of sampling points of the vibration signal with amplitude beyond a preset amplitude threshold, and determine whether the total number of sampling points with amplitude beyond the preset amplitude threshold exceeds a preset number threshold,
wherein the touch event is caused by a touch and the vibration signal is caused by a tap, the touch and the tap occur at different positions, and
wherein a position of the tap is outside the touch screen.
10. The system of claim 9 , wherein the vibration sensor is a microphone device.
11. The system of claim 9 , wherein the vibration sensor is an MEMS device.
12. A touch terminal comprising the system of claim 9 .
13. A touch terminal comprising the system of claim 10 .
14. A touch terminal comprising the system of claim 11 .