Wet finger tracking on capacitive touchscreens
View Patent ↗Techniques are presented for detection of a false touch on a touchscreen. The method includes recognizing a multi-touch instruction sequence, determining whether the multi-touch instruction sequence includes at least a first touch component corresponding to a predicted false touch, and in response to determining there is a false touch, disabling multi-touch functionality for the multi-touch instruction sequence.
1. A method of detecting a false touch on a touchscreen, comprising:
recognizing a multi-touch instruction sequence;
determining that the multi-touch instruction sequence includes at least a first touch input corresponding to a false touch and a second touch input corresponding to an active touch, wherein the active touch is caused by a user, and wherein the false touch is caused by an entity other than the user;
in response to determining that the first touch input corresponds to the false touch, selectively filtering out the first touch input within the multi-touch instruction sequence determined to correspond to the false touch; and
processing the second touch input within the multi-touch instruction sequence as a single-touch instruction.
2. The method of claim 1 , further comprising:
prompting the user to verify that the false touch occurred.
3. The method of claim 1 , wherein determining that the first touch input corresponds to the false touch further comprises:
determining whether the multi-touch instruction sequences is consistent with input training data generated by a training module.
4. The method of claim 1 , wherein determining that the first touch input corresponds to the false touch further comprises:
determining whether a touch that triggered the multi-touch instruction sequence occurs in an expected region of interaction.
5. The method of claim 1 , wherein determining that the first touch input corresponds to the false touch further comprises:
determining whether a touch that triggered the multi-touch instruction sequence exceeds a threshold time.
6. The method of claim 1 , wherein selectively filtering one or more touch inputs comprises:
disabling multi-touch functionality for the multi-touch instruction sequence in a region of the touchscreen the multi-touch instruction sequence was detected.
7. The method of claim 6 , wherein a touchscreen controller disables multi-touch functionality for the multi-touch instruction sequence.
8. A system, comprising:
a processor; and
a memory storing program code, which, when executed by the processor performs an operation for detecting a false touch on a touch screen, the operation comprising:
recognizing a multi-touch instruction sequence;
determining that the multi-touch instruction sequence includes at least a first touch input corresponding to a false touch and a second touch input corresponding to an active touch, wherein the active touch is caused by a user, and wherein the false touch is caused by an entity other than the user;
in response to determining that the first touch corresponds to the false touch, selectively filtering out the first touch input within the multi-touch instruction sequence determined to correspond to the false touch; and
processing the second touch input within the multi-touch instruction sequence as a single-touch instruction.
9. The system of claim 8 , further comprising:
prompting the user to verify that the false touch occurred.
10. The system of claim 8 , wherein determining that the multi-touch instruction sequence includes at least a first touch input corresponding to a false touch, comprises:
determining whether the multi-touch instruction sequences is consistent with input training data generated by a training module.
11. The system of claim 8 , wherein determining that the multi-touch instruction sequence includes at least a first touch input corresponding to a false touch, comprises:
determining whether a touch that triggered the multi-touch instruction sequence occurs in an expected region of interaction.
12. The system of claim 8 , wherein determining that the multi-touch instruction sequence includes at least a first touch input corresponding to a false touch, comprises:
determining whether a touch that triggered the multi-touch instruction sequence exceeds a threshold time.
13. The system of claim 8 , wherein selectively filtering one or more touch inputs, comprises:
disabling multi-touch functionality for the multi-touch instruction sequence in a region of the touchscreen the multi-touch instruction sequence was detected.
14. The system of claim 13 , wherein a touchscreen controller disables multi-touch functionality for the multi-touch instruction sequence.
15. A computer program product for detecting a false touch on a touch screen, the computer product comprising:
a non-transitory computer-readable storage medium having computer-readable program code embodied therewith, the computer-readable program code comprising:
computer-readable program code configured to recognize a multi-touch instruction sequence;
computer-readable program code configured to determine that the multi-touch instruction sequence includes at least a first touch and a second touch input corresponding to an active touch, wherein the active touch is caused by a user, and wherein the false touch is caused by an entity other than the user;
computer-readable program code configured to selectively filter out the first touch input within the multi-touch instruction sequence determined to correspond to the false touch, responsive to determining that the first touch corresponds to the false touch; and
computer-readable program code configured to process the second input within the multi-touch instruction sequence as a single touch instruction.
16. The non-transitory computer-readable storage medium of claim 15 , further comprising:
computer-readable program code configured to prompt the user to verify that the false touch occurred.
17. The non-transitory computer-readable storage medium of claim 15 , wherein computer-readable program code configured to determine that the multi-touch instruction sequence includes at least the first touch input, comprises:
computer-readable program code configured to determine whether the multi-touch instruction sequences is consistent with input training data generated by a training module.
18. The non-transitory computer-readable storage medium of claim 15 , wherein computer-readable program code configured to determine that the multi-touch instruction sequence includes at least the first touch input, comprises:
computer-readable program code configured to determine whether a touch that triggered the multi-touch instruction sequence occurs in an expected region of interaction.
19. The non-transitory computer-readable storage medium of claim 15 , wherein computer-readable program code configured to determine that the multi-touch instruction sequence includes at least the first touch input, comprises:
computer-readable program code configured to determine whether a touch that triggered the multi-touch instruction sequence exceeds a threshold time.
20. The non-transitory computer-readable storage medium of claim 15 wherein computer-readable program code configured to selectively filter the first touch input comprises:
computer-readable program code configured to disable multi-touch functionality for the multi-touch instruction sequence in a region of the touchscreen the multi-touch instruction sequence was detected.