Electronic device for measuring angle of face and rotating screen thereof and method thereof

1. An operation method of an electronic device, the operation method comprising:

obtaining image information at intervals of a predetermined time, the predetermined time set by a user, while content is displayed in a first direction in a screen of the electronic device;

identifying at least two areas in the image information, the at least two areas defined based on at least one line which pass through an origin point of the image information;

identifying a face included in the image information using the image information obtained at a first interval;

identifying a change for an angle of the face;

identifying a first area that includes the face among the at least two areas;

determining whether the face is positioned outside of the first area using the image information obtained at a second interval;

maintaining the content displayed in the first direction if the angle of the face is changed within the first area, when the face is identified among the at least two areas; and

changing the content displayed in the first direction to a second direction if the angle of the face is changed within a second area, when the face is not identified among the at least two areas.

2. The operation method of claim 1 , further comprising:

displaying a message about whether a smart rotation function is set;

allowing the user to select a certain region included in the message; and

verifying that the smart rotation function is set.

3. The operation method of claim 2 , further comprising verifying that the smart rotation function is set and stopping operations of a gyro sensor and an acceleration sensor.

4. The operation method of claim 3 , wherein the smart rotation function is a function for rotating the screen of the electronic device, such that the user watches the screen straight.

5. The operation method of claim 2 , wherein the smart rotation function is a function for rotating the screen of the electronic device, such that the user watches the screen straight.

6. The operation method of claim 1 , further comprising:

verifying that a smart rotation function is set; and

photographing an image to obtain the image information in a predetermined direction.

7. The operation method of claim 1 , wherein the identification of the face included in the image information comprises verifying positions of one or more eyes, a nose, or a mouth of the face.

8. The operation method of claim 1 , wherein the identification of the change for the angle of the face comprises;

taking a central coordinate of a line segment which connects both end points of lips of the identified face as a starting point, taking a central coordinate of a line segment which connects two eyes of the identified face as an end point, and displaying a virtual arrow in a direction from the starting point to the end point; and

detecting a direction of the virtual arrow.

9. The operation method of claim 8 , wherein the changing of the content displayed in the first direction to the second direction comprises:

determining whether the direction of the virtual arrow is included in the first area,

not rotating the content in the screen when the direction of the virtual arrow is included in the first area, and

rotating the content in the screen when the direction of the virtual arrow is included in the second area.

10. An electronic device comprising:

a memory;

a processor unit coupled to the memory, the processor unit configured to:

obtain an image information at intervals of a predetermined time, the predetermined time set by a user, while content is displayed in a first direction in a screen of the electronic device;

identify at least two areas in the image information, the at least two areas defined based on at least one line which pass through an origin point of image information,

identifying a face included in the image information using the image information obtained at a first interval,

identifying a change for an angle of the face

identify a first area that includes the face among the at least two areas,

determine whether the face is positioned outside of the first area using the image information obtained at a second interval,

maintain the content displayed in the first direction if the angle of the face is changed within the first area, when the face is identified among the at least two areas, and

change the content displayed in the first direction to a second direction if the angle of the face is changed within a second area, when the face is not identified among the at least two areas.

11. The electronic device of claim 10 , further comprising a touch screen configured to display a message about whether a smart rotation function is set and allow the user to select a certain area included in the message, wherein the processor unit is configured to verify that the smart rotation function is set.

12. The electronic device of claim 11 , wherein the processor unit is configured to verify that the smart rotation function is set and stop operations of a gyro sensor and an acceleration sensor.

13. The electronic device of claim 12 , wherein the smart rotation function is a function for rotating the screen of the electronic device, such that the user watches the screen straight.

14. The electronic device of claim 11 , wherein the smart rotation function is a function for rotating the screen of the electronic device, such that the user watches the screen straight.

15. The electronic device of claim 10 , wherein the processor unit is configured to verify that a smart rotation function is set and wherein the memory includes a camera module configured to photograph an image to obtain the image information in a predetermined direction.

16. The electronic device of claim 10 , wherein the memory includes a face recognition module configured to verify positions of one or more eyes, a nose, and a mouth of the face.

17. The electronic device of claim 10 , wherein the processor unit is configured to take a central coordinate of a line segment that connects both end points of lips of the identified face as a starting point, take a central coordinate of a line segment which connects two eyes of the identified face as an end point, display a virtual arrow in a direction from the starting point to the end point, and detect a direction of the virtual arrow.

18. The electronic device of claim 17 , wherein the processor unit is configured to determine whether the direction of the virtual arrow is included in the first area, not rotate the content in the screen when the direction of the virtual arrow is included in the first area, and rotate the content in the screen when the direction of the virtual arrow is included in the second area.