Information processing apparatus, information processing method and medium for storing information processing program

• US 9,098,184 B2
• Filed: 12/15/2011
• Issued: 08/04/2015
• Est. Priority Date: 01/06/2011
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Akiyama, Katsuhiko
• Primary Examiner(s): Chang, Kent
• Assistant Examiner(s): ROSARIO, NELSON M
• Application Number:
  US13/326,430
• Publication Number:
  US 20120176324A1
• Time in Patent Office: 1,328 Days
• Field of Search: 345156-173, 715/773
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text
• CPC Class Codes: G06F 3/04886 by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus

Abstract

An information processing apparatus includes a processor which executes a process including receiving position information of a plurality of touch points on a screen, displaying a plurality of operation areas to be touched on the screen, calculating a length of a stroke including the touch points on a basis of the position information received in the receiving, measuring a time period for drawing the stroke including the touch points on a basis of the position information received in the receiving, setting a threshold value on a basis of relationship information, and comparing one of the time period measured in the measuring and the length of the stroke calculated in the calculating with the threshold value set in the setting to determine whether the position information received in the receiving is input by a handwriting or by a touch operation on the operation areas in accordance with a comparison result.

Claims

1. An information processing apparatus comprising:

a memory; and

a processor coupled to the memory and configured to;

display a keyboard including a plurality of operation areas to be touched on a screen of a display,

receive position information of a plurality of touch points within the keyboard on the screen, the plurality of touch points including a first touch point and a second touch point, as a stroke which is an unbroken line from the first touch point to the second touch point detected within the keyboard on the screen, the first touch point being located at a first position within the keyboard on the screen, and the second touch point being located at a second position within the keyboard on the screen different from the first position within the keyboard on the screen,

execute a calculation of a size of the stroke from the first touch point to the second touch point,

measure a time period for the stroke, the time period starting at a first time when the processor receives first position information corresponding to the first position, and the time period terminating at a second time when the processor receives second position information corresponding to the second position different from the first position, and

determine whether the position information is input by a sliding operation on the keyboard or by a touch operation for the plurality of operation areas in the keyboard on basis of both the calculated size of the stroke and the measured time period.

2. The information processing apparatus according to claim 1, wherein the processor is configured to:

access reference relationship information between a length of a stroke including a plurality of touch points within the keyboard on the screen of the display and a time period for a stroke;

set a threshold value on basis of the reference relationship information for the measured time period corresponding to the size of the stroke calculated; and

compare the time period measured for the stroke with the set threshold value to determine that the position information is input by the sliding operation on the keyboard when the time period measured is longer than the set threshold value and to determine that the position information is input by the touch operation for the plurality of operation areas in the keyboard when the time period measured is shorter than the set threshold value.

3. The information processing apparatus according to claim 2, wherein

the reference relationship information is obtained by any one of linear approximation, linear interpolation, curve approximation or curve interpolation, on a plurality of minimum values, a minimum value being a minimum time period among a plurality of time periods measured in advance for a size of a stroke in which position information of touch points is input by a sliding operation on a displayed keyboard.

4. The information processing apparatus according to claim 3, wherein the reference relationship information is obtained by any one of linear approximation or curve approximation on a minimum value for a section of a range of sizes of a stroke.

5. The information processing apparatus according to claim 3, wherein the reference relationship information is obtained by approximating the minimum value with a logarithmic function.

6. The information processing apparatus according to claim 3, wherein the reference relationship information is obtained by approximating the minimum value with an exponential function.

7. The information processing apparatus according to claim 2, wherein

the reference relationship information is obtained by any one of linear approximation, linear interpolation, curve approximation and curve interpolation, on a plurality of maximum values, a maximum value being a maximum time period among a plurality of time periods measured in advance for a size of a stroke in which position information of touch points including first and second touch points is input by a touch operation for a plurality of operation areas in a displayed keyboard.

8. The information processing apparatus according to claim 1, wherein the calculation includes calculating a total size for the stroke.

9. The information processing apparatus according to claim 1, wherein the calculation includes calculating an area of a rectangle circumscribing the stroke or a length of a long side of the rectangle.

10. The information processing apparatus according to claim 1, wherein the calculation includes:

calculating a plurality of sizes for the stroke including the first and second touch points, a size of the stroke obtained by weighting a length of a part of a stroke in accordance with a progressing direction of the part or a change in the progressing direction.

11. The information processing apparatus according to claim 1, wherein the processor is configured to:

store the position information received;

execute a given process using the stored position information when determined that the position information is be input by the sliding operation on the keyboard;

select an operation area among the plurality of operation areas in the keyboard on basis of the stored position information when determined that the position information is input by the touch operation for the plurality of operation areas in the keyboard and execute a given process corresponding to the selected operation area.

12. The information processing apparatus according to claim 1, wherein the processor is configured to:

determine a threshold value on a basis of the calculated size of the stroke; and

compare the measured time period for drawing the stroke with the determined threshold value to determine whether the position information is input by the sliding operation or by the touch operation for the plurality of operation areas in the keyboard.

13. The information processing apparatus according to claim 1, wherein the processor is configured to:

determine a threshold value on a basis of the measured time period for drawing the stroke; and

compare the calculated size of the stroke with the determined threshold value to determine whether the position information is input by the sliding operation or by the touch operation for the plurality of operation areas in the keyboard.

14. The information processing apparatus according claim 1, wherein

the first touch point is a starting point of the stroke and the second touch point is an end point of the stroke.

15. The information processing apparatus according to claim 1, wherein the processor is configured to:

execute a character recognition on basis of the stroke when it is determined that the position information is input by the sliding operation on the keyboard.

16. A method of processing information for a screen of a display comprising:

displaying a keyboard including a plurality of operation areas to be touched on the screen;

receiving position information of a plurality of touch points within the keyboard on the screen, the plurality of touch points including a first touch point and a second touch point, as a stroke which is an unbroken line from the first touch point to the second touch point detected on within the keyboard on the screen, the first touch point being located at a first position within the keyboard on the screen, and the second touch point being located at a second position within the keyboard on the screen different from the first position within the keyboard on the screen;

calculating a size of the stroke from the first touch point to the second touch point;

measuring a time period for the stroke, the time period starting at a first time when first position information corresponding to the first position is received, and the time period terminating at a second time when second position information corresponding to the second position different from the first position is received; and

determining whether the position information is input by a sliding operation on the keyboard or by an touch operation for the plurality of operation areas in the keyboard on the screen on basis of both the calculated size of the stroke and the measured time period for drawing the stroke.

17. The method according claim 16, wherein

the first touch point is a starting point of the stroke and the second touch point is an end point of the stroke.

18. The method according to claim 16, further comprising:

executing a character recognition on basis of the stroke when it is determined that the position information is input by the sliding operation on the keyboard.

19. A non-transitory computer readable recording medium for causing a computer to execute a process for a screen of a display, the process including:

displaying a keyboard including a plurality of operation areas to be touched on the screen;

receiving position information of a plurality of touch points within the keyboard on the screen, the plurality of touch points including a first touch point and a second touch point, as a stroke which is an unbroken line from the first touch point to the second touch point detected e-n within the keyboard on the screen, the first touch point being located at a first position within the keyboard on the screen, and the second touch point being located at a second position within the keyboard on the screen different from the first position within the keyboard on the screen;

calculating a size of the stroke from the first touch point to the second touch point;

measuring a time period for the stroke, the time period starting at a first time when first position information corresponding to the first position is received, and the time period terminating at a second time when second position information corresponding to the second position different from the first position is received; and

determining whether the position information is input by a sliding operation on the keyboard or by an touch operation for the plurality of operation areas in the keyboard on the screen on basis of both the calculated size of the stroke and the measured time period for drawing the stroke.

20. The non-transitory computer readable recording medium according claim 19, wherein the first touch point is a starting point of the stroke and the second touch point is an end point of the stroke.