Safety scheme for gesture-based game system

1. A method performed under control of a gesture-based game system, comprising:

determining whether an obstacle exists within a playing space associated with a game being currently played on the gesture-based game system;

generating in a display area associated with the game a barrier image associated with the obstacle;

determining a location of a player and a location of the obstacle in the playing space;

determining a distance between the player and the obstacle based at least in part on the determined location of the player and the determined location of the obstacle;

generating in the display area an avatar image associated with the player;

determining a virtual distance between the avatar image and the barrier image based at least in part on the determined distance between the player and the obstacle; and

comparing the determined virtual distance with a predetermined distance limit,

wherein the generating the barrier image includes locating the barrier image separated by the determined virtual distance from the avatar image and is performed when the determined virtual distance is shorter than the predetermined distance limit.

2. The method of claim 1 , wherein the determining the virtual distance includes determining the virtual distance based at least in part on a predetermined safety margin.

3. The method of claim 2 , wherein the predetermined safety margin varies depending on the game being currently played on the gesture-based game system.

4. The method of claim 1 , wherein the determining the virtual distance includes determining the virtual distance in proportion to the distance between the player and the obstacle.

5. The method of claim 4 , wherein the ratio between the determined virtual distance and the determined distance between the player and the obstacle varies depending on the game being currently played on the gesture-based game system.

6. The method of claim 1 , wherein the barrier image is configured to be immovable during the playing of the game.

7. The method of claim 1 , further comprising:

displaying the barrier image on a display device.

8. A gesture-based game system, comprising:

a location determination unit configured to obtain player location information of a player and obstacle location information of an obstacle in a playing space during a playing of a game using the gesture-based game system;

a distance determination unit configured to determine a distance between the player and the obstacle based at least in part on the player location information and the obstacle location information;

a virtual distance determination unit configured to determine in a display area a virtual distance between an avatar image associated with the player and a barrier image associated with the obstacle based at least in part on the determined distance; and

an image generation unit configured to:

generate in the display area the avatar image and the barrier image, separated from each other by the determined virtual distance, and

generate the barrier image in the display area, if the determined virtual distance is shorter than a predetermined distance limit.

9. The gesture-based game system of claim 8 , further comprising:

a camera configured to capture an image of the player and the obstacle, and

wherein the player location information and the obstacle location information are based at least in part on the captured image of the player and the obstacle.

10. The gesture-based game system of claim 8 , wherein the barrier image is configured to be immovable during the playing of the game.

11. The gesture-based game system of claim 8 , wherein the virtual distance determination unit is further configured to determine the virtual distance between the avatar image and the barrier image in proportion to the determined distance between the player and the obstacle.

12. The gesture-based game system of claim 11 , wherein the ratio between the virtual distance and the distance varies depending on the game.

13. The gesture-based game system of claim 8 , wherein the virtual distance determination unit is further configured to determine the virtual distance based at least in part on the determined distance received from the distance determination unit and a predetermined safety margin.

14. The gesture-based game system of claim 13 , wherein the predetermined safety margin varies depending on the game.

15. A non-transitory computer-readable storage medium having stored thereon computer-executable instructions that, in response to execution, cause a gesture-based game system to perform operations, comprising:

determining a distance between a player of a game and an obstacle in the proximity of the player in a playing space;

comparing in a display area a virtual distance between an avatar image corresponding to the player and a barrier image corresponding to the obstacle with a predetermined distance limit;

generating in the display area the avatar image; and

generating in the display area the barrier image separated by the determined virtual distance from the avatar image, if the determined virtual distance is shorter than the predetermined distance limit.

16. The non-transitory computer-readable medium of claim 15 , wherein the operations further comprises:

determining in the display area the determined virtual distance based at least in part on the determined distance.

17. The non-transitory computer-readable medium of claim 15 , wherein the barrier image is configured to be immovable during the playing of the game.

18. The non-transitory computer-readable storage medium of claim 15 , wherein the predetermined distance limit varies depending on the game.

19. The non-transitory computer-readable storage medium of claim 15 , wherein the determining the virtual distance includes determining the virtual distance in proportion to the distance between the player and the obstacle.

20. The non-transitory computer-readable storage medium of claim 15 , wherein the determining the virtual distance includes determining the virtual distance based at least in part on a predetermined safety margin.

21. The non-transitory computer-readable storage medium of claim 20 , wherein the predetermined safety margin varies depending on the game.

22. The non-transitory computer-readable storage medium of claim 15 , the operations further comprising:

displaying at least one of the avatar image and the barrier image on a display device.