Visual feedback method and apparatus for touch selection
View Patent ↗According to a visual feedback method and apparatus for touch selection that are provided by embodiments of the present invention, touch information and a center point of touch are acquired, where the foregoing touch information is a touch area and/or touch pressure; an area size of a feedback graph is determined according to the foregoing touch information; and, by using the foregoing center point of touch as a center, the foregoing feedback graph is displayed according to the area size of the feedback graph, for a user to determine a touch position. Because the size of a feedback graph is determined according to the touch information (a touch area and/or touch pressure), precision of visual feedback for touch selection can be improved.
1. A visual feedback method for touch selection, comprising:
acquiring touch information and a center point of touch, wherein the touch information is a touch area;
determining an area size of a feedback graph according to a normalized value of the touch information; and
displaying the feedback graph according to the area size of the feedback graph and such that a user can determine a touch position from the feedback graph, wherein the displaying comprises using the center point of touch as a center;
wherein the determining the area size of the feedback graph comprises determining the area size of the feedback graph according to S=S 0 +(S 1 −S 0 )×T(s);
wherein S is the determined area size of the feedback graph; S 0 is a preset minimum area of the feedback graph, S 1 is a preset maximum area of the feedback graph, T(s) is an interpolator function, s is a normalized value of an acquired touch area; and
wherein
s
=
S
i
n
-
S
m
i
n
S
m
a
x
-
S
m
i
n
,
wherein S in is the acquired touch area, S min is a preset minimum touch area, and S max is a preset maximum touch area.
2. A visual feedback apparatus for touch selection, comprising:
a processor;
a non-transitory computer readable medium connected to the processor and having stored thereon instructions for causing the processor to:
acquire touch information and a center point of touch, wherein the touch information is a touch area;
determine an area size of a feedback graph according to a normalized value of the touch information; and
display the feedback graph according to the area size of the feedback graph and such that user can determine a touch position, wherein the feedback graph is displayed using the center point of touch as a center;
wherein the instructions for causing the processor to determine the area size of a feedback graph comprise instructions for causing the processor to determine the area size of the feedback graph according to S=S 0 +(S 1 −S 0 )×T(s);
wherein S is the determined area size of the feedback graph; S 0 is a preset minimum area of the feedback graph, S 1 is a preset maximum area of the feedback graph, T(s) is an interpolator function, s is a normalized value of an acquired touch area; and
wherein
s
=
S
in
-
S
min
S
max
-
S
min
,
wherein S in is the acquired touch area, S min is a preset minimum touch area, and S max is a preset maximum touch area.