INFORMATION PROCESSING APPARATUS, CONTROL METHOD THEREOF, AND STORAGE MEDIUM

• US 20130222340A1
• Filed: 02/25/2013
• Published: 08/29/2013
• Est. Priority Date: 02/28/2012
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Ito, Hikaru
• Granted Patent: US 9,880,673 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04806 Zoom, i.e. interaction techniques or interactors for controlling the zooming operation
• CPC Class Codes: G06F 2203/04808 Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures

Abstract

A control method for an information processing apparatus configured to acquire position information of one or more touched points one by one detected according to a predetermined detection period on a touch panel includes holding the position information of each of the one or more touched points in a holding unit, acquiring a number of the touched points whose position information is held in the holding unit, determining at each predetermined detection period that latest position information of all the touched points whose position information is held in the holding unit is specified, in a case where the number of the acquired touched point is two or more, and deciding the multi-touch operation performed to the information processing apparatus after the determination.

Claims

1. An information processing apparatus configured to acquire position information of one or more touched points one by one detected according to a predetermined detection period on a touch panel, the information processing apparatus comprising:

a holding unit configured to hold the position information for each of the one or more touched points;

an acquisition unit configured to acquire a number of the touched points whose position information is held in the holding unit;

a determination unit configured to determine at each predetermined detection period that latest position information of all the touched points whose position information is held in the holding unit is specified, in a case where the number of the touched point acquired by the acquisition unit is two or more, and

a decision unit configured to decide a multi-touch operation performed to the information processing apparatus after the determination performed by the determination unit.

2. The information processing apparatus according to claim 1, wherein the determination unit determines that the latest position information of all the touched points is specified in response to completion of an update of the position information of all the touched points held in the holding unit, and

wherein the decision unit decides the multi-touch operation performed to the information processing apparatus in response to completion of the determination that the position information of all the plurality of the touched points is specified.

3. The information processing apparatus according to claim 1, wherein the determination unit determines that all the plurality of the touched points is specified based on elapse of a predetermined time after earliest position information is updated among the position information held in the holding unit, and

the decision unit decides the multi-touch operation performed to the information processing apparatus after it is determined that the position information of all the plurality of touched points is specified.

4. The information processing apparatus according to claim 1, further comprising a distance acquisition unit configured to acquire a changed amount of a distance between the plurality of touched points based on the position information held in the holding unit,

wherein the decision unit decides that the operation performed to the information processing apparatus is a first operation in a case where the changed amount of the distance acquired by the distance acquisition unit exceeds a first threshold value, and decides that the operation performed to the information processing apparatus is a second operation in a case where the changed amount of the distance acquired by the distance acquisition unit does not exceed the first threshold value.

5. The information processing apparatus according to claim 4, further comprising a display control unit configured to display an enlarged or reduced image on a display unit in response to a reception of the first operation.

6. The information processing apparatus according to claim 4, further comprising a display control unit configured to specify and display an image different from an image displayed on the display unit in response to a reception of the second operation.

7. The information processing apparatus according to claim 1, further comprising an angle acquisition unit configured to acquire an angle difference of movement directions of the plurality of touched points based on the position information held in the holding unit,

wherein the decision unit decides that the operation performed to the information processing apparatus is a first operation in a case where an angle difference of movement directions acquired by the angle acquisition unit is a second threshold value or larger, and decides that the operation performed to the information processing apparatus is a second operation in a case where the angle difference of the movement directions acquired by the angle acquisition unit is smaller than the second threshold value.

8. The information processing apparatus according to claim 7, further comprising a generation unit configured to generate a movement vector for each of the plurality of touched points based on a shift of the position information of each of the plurality of touched points held in the holding unit,

wherein the angle acquisition unit acquires the angle difference of the movement directions of the plurality of touched points based on the direction of each movement vector of the plurality of touched points generated by the generation unit.

9. The information processing apparatus according to claim 7, further comprising a display control unit configured to display an enlarged or reduced image on a display unit in response to a reception of the first operation.

10. The information processing apparatus according to claim 7, further comprising a display control unit configured to specify and display an image different from an image displayed on the display unit in response to a reception of the second operation.

11. A computer-readable storage medium storing a computer-executable program, when read and executed by a computer, for causing the computer to operate as the information processing apparatus according to claim 1.

12. A control method for an information processing apparatus configured to acquire position information of one or more touched points one by one detected according to a predetermined detection period on a touch panel, the method comprising:

holding the position information of each of the one or more touched points in a holding unit;

acquiring a number of the touched points whose position information is held in the holding unit;

determining at each predetermined detection period that latest position information of all the touched points whose position information is held in the holding unit is specified, in a case where the number of the acquired touched point is two or more, and

deciding the multi-touch operation performed to the information processing apparatus after the determination.