Face recognition method and mobile terminal

1. A face recognition method applied to a mobile terminal, comprising:

detecting whether a mobile terminal switches from a stationary state to a raised state by:

obtaining acceleration values of the mobile terminal in three-dimensional space at a preset interval;

determining spatial angle information of the mobile terminal according to the acceleration values; and

according to change amount of the spatial angle information in a preset time period, judging whether the mobile terminal switches from the stationary state to the raised state in the preset time period;

activating a camera and capturing an image by the camera, when the mobile terminal switches from the stationary state to the raised state;

judging whether the image matches a preset face template; and

determining that recognition is successful when the image matches the preset face template.

2. The method according to claim 1 , wherein the detecting whether a mobile terminal switches from a stationary state to a raised state, comprises: when the mobile terminal is in a preset state, detecting whether the mobile terminal switches from the stationary state to the raised state, wherein the preset state comprises a screen-off state or a locked screen state.

3. The method according to claim 2 , wherein the capturing an image by the camera, comprises: capturing an image in the preset state by the camera.

4. The method according to claim 1 , wherein before the step of judging whether the image matches a preset face template, the method further comprises: calculating an angle between a target face in the image and the mobile terminal; when the angle is within a preset range, judging whether the image matches the preset face template.

5. A mobile terminal comprising:

one or more processors;

a memory; and

one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and wherein the one or more programs are executed to implement steps of the face recognition method according to claim 1 .

6. A computer readable storage medium comprising a computer program stored thereon, wherein the computer program is executed by a processor to implement the steps of the face recognition method according to claim 1 .

7. A mobile terminal comprising:

a detecting module used to detect whether the mobile terminal switches from a stationary state to a raised state, wherein the detecting module comprises:

an obtaining unit used to obtain acceleration values of the mobile terminal in three-dimensional space detected by a three-axis acceleration sensor at a preset interval;

an angle determining unit used to determine spatial angle information of the mobile terminal according to the acceleration values; and

a judging unit used to, according to change amount of the spatial angle information in a preset time period, judge whether the mobile terminal switches from the stationary state to the raised state in the preset time period;

an activation module used to, when the mobile terminal switches from the stationary state to the raised state, activate a camera to capture an image by the camera;

a judging module used to judge whether the image matches a preset face template;

a determination module used to determine that recognition is successful when the image matches the preset face template.

8. The mobile terminal according to claim 7 , wherein the detecting module is specifically used to, when the mobile terminal is in a preset state, detect whether the mobile terminal switches from the stationary state to the raised state, wherein the preset state includes a screen-off state or a locked screen state.

9. The mobile terminal according to claim 8 , wherein capturing the image by the camera comprises: capturing an image in the preset state by the camera.

10. The mobile terminal according to claim 7 , wherein the mobile terminal further comprises: a calculation module used to calculate an angle between a target face in the image and the mobile terminal; when the angle is within a preset range, trigger the judging module to perform the step of judging whether the image matches the preset face template.