MULTI-POINT DETECTION ON A SINGLE-POINT DETECTION DIGITIZER
A method for recognizing a multi-point gesture provided to a digitizer, the method comprises: detecting outputs from a digitizer system corresponding to a multi-point interaction, the digitizer system including a digitizer sensor; determining a region incorporating possible locations derivable from the outputs detected; tracking the region over a time period of the multi-point interaction; determining a change in at least one spatial feature of the region during the multi-point interaction; and recognizing the gesture in response to a pre-defined change.
1 . A method for recognizing a multi-point gesture provided to a digitizer, the method comprising:
detecting outputs from a digitizer system corresponding to a multi-point interaction, the digitizer system including a digitizer sensor;
determining a region incorporating possible locations derivable from the outputs detected;
tracking the region over a time period of the multi-point interaction;
determining a change in at least one spatial feature of the region during the multi-point interaction; and
recognizing the gesture in response to a pre-deflined change.
2 . The method according to claim 1 , wherein the digitizer system is a single point detection digitizer system.
3 . The method according to claim 1 , wherein the at least one feature is selected from a group including: shape of the region, aspect ratio of the region, size of the region, location of the region, and orientation of the region.
4 . The method according to claim 1 , wherein the region is a rectangular region with dimensions defined by the extent of the possible interaction locations.
5 . The method according to claim 4 , wherein the at least one feature is selected from a group including a length of a diagonal of the rectangle and an angle of the diagonal.
6 . The method according to claim 1 , wherein the multi-point interaction is performed with at least two like user interactions.
7 . The method according to claim 6 , wherein the at least two like user interactions are selected from a group including: at least two fingertips, at least two like styluses and at least two like tokens.
8 . The method according to claim 6 , wherein the at least two like user interactions interact with the digitizer sensor by touch, hovering, or both touch and hovering.
9 . The method according to claim 6 , wherein the outputs detected are ambiguous with respect to the location of at least one of the at least two user interactions.
10 . The method according to claim 6 , wherein one of the at least two user interactions is stationary during the multi-point interaction.
11 . The method according to claim 10 comprising:
identifying the location of the stationary user interaction; and
tracking the location of the other user interaction based on knowledge of the location of the stationary user interaction.
12 . The method according to claim 10 , wherein the location of the stationary user interaction is a substantially stationary corner of a rectangular region with dimensions defined by the extent of the possible interaction locations.
13 . The method according to claim 6 , comprising:
detecting a location of a first user interaction from the at least two user interactions in response to that user interaction appearing before the other user interaction; and
tracking locations of each of the two user interactions based on the detected location of the first user interaction.
14 . The method according to claim 6 , wherein interaction performed by the first user interaction changes a functionality of interaction performed by the other user interaction.
15 . The method according to claim 1 , wherein the digitizer sensor is formed by a plurality of conductive lines arranged in a grid.
16 . The method according to claim 15 , wherein the outputs are a single array of outputs for each axis of the grid.
17 . The method according to claim 1 , wherein the outputs are detected by a capacitive detection.
18 . A method for providing multi-point functionality on a single point detection digitizer, the method comprising:
detecting a multi-point interaction from outputs of a single point detection digitizer system, wherein the digitizer system includes a digitizer sensor;
determining at least one spatial feature of the interaction;
tracking the at least one spatial feature; and
identifying a functionality of the multi-point interaction responsive to a pre-defined change in the at least one spatial feature.
19 . The method according to claim 18 , wherein the multi-point functionality provides recognition of at least one of multi-point gesture commands and modifier commands.
20 . The method according to claim 18 , wherein a first interaction location of the multi-point interaction is configured for selection of a virtual button displayed on a display associated with the digitizer system, wherein the virtual button is configured for modifying a functionality of the at least one other interaction location of the multi-point interaction.
21 . The method according to claim 20 , wherein the at least one other interaction is a gesture.
22 . The method according to claim 20 , wherein the first interaction and the at least one other interaction are performed over non-interfering portions of the digitizer sensor.
23 . The method according to claim 18 , wherein the spatial feature is a feature of a region incorporating possible interaction locations derivable from the outputs.
24 . The method according to claim 23 , wherein the at least one feature is selected from a group including: shape of the region, aspect ratio of the region, size of the region, location of the region, and orientation of the region.
25 . The method according to claim 23 , wherein the region is a rectangular region with dimensions defined by the extent of the possible interaction locations.
26 . The method according to claim 25 , wherein the at least one feature is selected from a group including a length of a diagonal of the rectangle and an angle of the diagonal.
27 . The method according to claim 18 , wherein the multi-point interaction is performed with at least two like user interactions.
28 . The method according to claim 27 , wherein the at least two like user interactions are selected from a group including: at least two fingertips, at least two like styluses and at least two like tokens.
29 . The method according to claim 27 , wherein the at least two like user interactions interact with the digitizer sensor by touch, hovering, or both touch and hovering.
30 . The method according to claim 27 , wherein the outputs detected are ambiguous with respect to the location of at least one of the at least two user interactions.
31 . The method according to claim 27 , wherein one of the at least two user interactions is stationary during the multi-point interaction.
32 . The method according to claim 31 comprising:
identifying the location of the stationary user interaction; and
tracking the location of the other user interaction based on knowledge of the location of the stationary user interaction.
33 . The method according to claim 31 , wherein the location of the stationary user interaction is a substantially stationary corner of a rectangular region with dimensions defined by the extent of the possible interaction locations.
34 . The method according to claim 27 , comprising:
detecting a location of a first user interaction from the at least two user interactions in response to that user interaction appearing before the other user interaction; and
tracking locations of each of the two user interactions based on the detected location of the first user interaction.
35 . The method according to claim 27 , wherein interaction performed by the first user interaction changes a functionality of interaction performed by the other user interaction.
36 . The method according to claim 18 , wherein the digitizer sensor is formed by a plurality of conductive lines arranged in a grid.
37 . The method according to claim 36 , wherein the outputs are a single array of outputs for each axis of the grid.
38 . The method according to claim 18 , wherein the outputs are detected by a capacitive detection.
39 . A method for providing multi-point functionality on a single point detection digitizer, the method comprising:
detecting a multi-point interaction from outputs of a single point detection digitizer system, wherein one interaction location is stationary during the multi-point interaction;
identifying the location of the stationary interaction; and
tracking the location of the other interaction based on knowledge of the location of the stationary interaction.
40 . The method according to claim 39 , wherein the location of the stationary interaction is a substantially stationary corner of a rectangular region with dimensions defined by the extent of possible interaction locations of the multi-point interaction.
41 . The method according to claim 39 , comprising.
detecting a location of a first interaction from the at least two user interactions in response to that interaction appearing before the other interaction; and
tracking locations of each of the two interactions based on the detected location of the first user interaction.
42 . The method according to claim 41 , wherein the first interaction changes a functionality of the other interaction.