Position information correction device, position information correction method, and program

• US 8,913,032 B2
• Filed: 02/24/2012
• Issued: 12/16/2014
• Est. Priority Date: 03/18/2011
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kikuchi, Naoki
• Primary Examiner(s): Nguyen, Kevin M
• Assistant Examiner(s): Lee, Jr., Kenneth B
• Application Number:
  US13/404,653
• Publication Number:
  US 20120235952A1
• Time in Patent Office: 1,026 Days
• Field of Search: 345173-183, 702/94
• US Class Current: 345/174
• CPC Class Codes: G06F 3/04186 Touch location disambiguation
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

There is provided a position information correction device including an input point acquisition section which acquires position information of an input point specified by an operating object, a direction detection section which detects a movement direction of the operating object based on displacement of the position information acquired by the input point acquisition section for each input point, a determination section which takes a majority vote of the movement directions of past input points acquired by the input point acquisition section in the past, and determines the movement direction of the operating object with respect to a current input point acquired by the input point acquisition section at a current time point, and a position information correction section which, when the movement direction detected by the direction detection section differs from the movement direction determined by the determination section, corrects position information of the current input point.

Claims

1. A position information correction device comprising:

circuitry configured to;

acquire position information of one or more input points specified by an operating object;

detect a movement direction of the operating object based on displacement of the position information acquired for each of the one or more input points;

determine the movement direction of the operating object at a current input point of the one or more input points by taking a majority vote of movement directions of the operating object at past input points of the one or more input points; and

correct the position information of the current input point when the detected movement direction of the operating object is different from the determined movement direction of the operating object.

2. The position information correction device according to claim 1, wherein the circuitry is configured to:

set a reference region including the current input point, and

determine the movement direction of the operating object based on a movement direction of a past input point of the one or more input points included within the reference region.

3. The position information correction device according to claim 2, wherein the circuitry acquires position information of the operating object that comes into contact with or comes close to a touch sensor, and sets the reference region having a size in accordance with device characteristics of the touch sensor.

4. The position information correction device according to claim 2, wherein the circuitry sets the reference region having a predetermined size in accordance with a resolution of the touch sensor.

5. The position information correction device according to claim 2, wherein the touch sensor is a capacitive touch sensor, and the circuitry increases a size of the reference region as the reference region is nearer to a grid boundary of the touch sensor.

6. The position information correction device according to claim 1, wherein the circuitry corrects the position information of the current input point based on the position information of an input point that is acquired immediately prior to the current input point.

7. The position information correction device according to claim 6, wherein the circuitry corrects the position information in a manner that the position information of the current input point becomes equal to the position information of the input point that is acquired immediately prior to the current input point.

8. The position information correction device according to claim 1, wherein the circuitry is configured to:

determine a movement distance of the current input point based on a movement distance of one of the past input points, and

correct the position information of the current input point using the movement distance determined.

9. The position information correction device according to claim 8, wherein the circuitry determines the movement distance of the current input point by taking a majority vote of movement distances of the past input points.

10. The position information correction device according to claim 9, wherein the circuitry determines the movement distance of the current input point by taking a majority vote of the movement distances of the past input points at a segment width corresponding to a degree of variation of the movement distances of the past input points.

11. The position information correction device according to claim 8, wherein the circuitry calculates a probability distribution of movement distances of the current input point based on the movement distance of the one of the past input points, and sets a movement distance having the highest probability distribution as the movement distance of the current input point.

12. A position information correction method comprising:

acquiring position information of one or more input points specified by an operating object;

detecting a movement direction of the operating object based on displacement of the acquired position information for each of the one or more input points;

determining the movement direction of the operating object at a current input point of the one or more input points by taking a majority vote of movement directions of the operating object at past input points of the one or more input points; and

correcting the position information of the current input point when the detected movement direction of the operating object is different from the determined movement direction of the operating object.

13. A non-transitory computer-readable medium encoded with computer-readable instructions thereon that, when executed by a computer, cause the computer to perform a method comprising:

acquiring position information of one or more input points specified by an operating object;

detecting a movement direction of the operating object based on displacement of the position information acquired for each of the one or more input points;

determining the movement direction of the operating object at a current input point of the one or more input points by taking a majority vote of movement directions of the operating object at past input points of the one or more input points; and

correcting the position information of the current input point when the detected movement direction of the operating object is different from the determined movement direction of the operating object.