Terminal device, image display method, and storage medium

1. An information processing apparatus comprising:

a display;

a touch panel stacked on or integrally formed with the display; and

circuitry configured to

receive an output from the touch panel indicating that first gesture input is detected that substantially encloses a region of the display;

receive an output from the touch panel indicating that a dragging gesture input is detected subsequent to the first gesture input;

control the display to expand an image displayed by the display when the dragging gesture is performed in a predetermined direction in relation to the display; and

control the display to stop expanding the image when at least one edge portion of the enclosed region corresponding to the first gesture input reaches a side of the display and the dragging gesture operation is still being performed.

2. The information processing apparatus of claim 1 , wherein

the circuitry is configured to control the display to expand the image so that the at least one edge portion of the region enclosed by the first gesture input reaches the side of the display.

3. The information processing apparatus of claim 1 , wherein

the drag gesture input is a continuation of the first gesture input.

4. The information processing apparatus of claim 1 , wherein

the circuitry is configured to control the display to expand the image based on a length of the dragging gesture input.

5. The information processing apparatus of claim 1 , wherein

the circuitry is configured to control the display to stop expanding the image when the dragging gesture input is no longer detected.

6. The information processing apparatus of claim 1 , wherein

the circuitry is configured to control the display to stop expanding the image for a first predetermined period of time when a first horizontal or vertical edge portion of the enclosed region corresponding to the first gesture input reaches a side of the display and an output of the touch panel indicates that the dragging gesture operation is still detected.

7. The information processing apparatus of claim 6 , wherein

the circuitry is configured to control the display to continue expanding the image when the first predetermined period of time lapses and an output of the touch panel indicates that the dragging gesture operation is still detected.

8. The information processing apparatus of claim 7 , wherein

the circuitry is configured to control the display to stop expanding the image for a second predetermined period of time when a second horizontal or vertical edge portion of the enclosed region corresponding to the first gesture input teaches a side of the display and an output of the touch panel indicates that the dragging gesture operation is still detected.

9. The information processing apparatus of claim 8 , wherein

the circuitry is configured to control the display to continue expanding the image when the second predetermined period of time lapses and an output of the touch panel indicates that the dragging gesture operation is still detected.

10. The information processing apparatus of claim 9 , wherein

the circuitry is configured to control the display to stop expanding the image when a maximum magnification ratio of the image is reached.

11. The information processing apparatus of claim 9 , wherein

the circuitry is configured to control the display to stop expanding the image when a maximum magnification ratio of the image is reached and an output of the touch panel indicates that the dragging gesture operation is still detected.

12. The information processing apparatus of claim 1 , wherein

the circuitry is configured to normalize the enclosed region corresponding to the first gesture input as a rectangle or square shape.

13. The information processing apparatus of claim 12 , wherein

the circuitry is configured to control the display to expand the image so that the at least one edge portion of the rectangle or square shape reaches the side of the display.

14. The information processing apparatus of claim 12 , wherein

the circuitry is configured to control the display to expand the image based on the dragging gesture input until the at least one edge portion of the rectangle or square shape reaches the side of the display and the dragging gesture operation is still detected.

15. The information processing apparatus of claim 1 , wherein

the circuitry is configured to control the display to center the enclosed region corresponding to the first gesture operation on the display when expanding the image.

16. An information processing method performed by an information processing apparatus, the method comprising:

detecting, by a touch panel stacked on or integrally formed with a display of the information processing apparatus, a first gesture input that substantially encloses a region of the display;

detecting, by the touch panel, a dragging gesture input subsequent to the first gesture input;

controlling the display to expand an image displayed by the display when the dragging gesture is performed in a predetermined direction in relation to the display; and

controlling the display to stop expanding the image when at least one edge portion of the enclosed region corresponding to the first gesture input reaches a side of the display and the dragging gesture operation is still being performed.

17. A non-transitory computer-readable medium including computer program instructions, which when executed by an information processing apparatus, cause the information processing apparatus to perform a process, the process comprising:

detecting, by a touch panel stacked on or integrally formed with a display of the information processing apparatus, a gesture input that substantially encloses a region of the display;

detecting, by the touch panel, a dragging gesture input subsequent to the first gesture input;

controlling the display to expand an image displayed by the display when the dragging gesture is performed in a predetermined direction in relation to the display; and

controlling the display to stop expanding the image when at least one edge portion of the enclosed region corresponding to the first gesture input reaches a side of the display and the dragging gesture operation is still being performed.

18. The information processing apparatus of claim 1 , wherein

the circuitry is configured to control the display to expand the image displayed by the display only when the dragging gesture is performed in an upward direction in relation to the display and not when the dragging gesture is performed in any other direction in relation to the display.

19. The information processing apparatus of claim 1 , wherein

the circuitry is configured to control the display to continuously display the expansion of the image while the dragging gesture is being performed.

20. The information processing apparatus of claim 1 , wherein the circuitry is configured to

determine when the at least one edge portion of the enclosed region corresponding to the first gesture input reaches the side of the display; and

control the display to stop expanding the image when the at least one edge portion of the enclosed region corresponding to the first gesture input is determined to reach the side of the display while the dragging gesture operation is still being performed.