Method and apparatus for auto-focusing of an photographing device

1. A method for auto-focusing of an electronic device, the method comprising:

collecting sensor information using a plurality of sensors of the electronic device when a camera of the electronic device is driven,

selecting a first sensor for determining a direction of a subject and a second sensor for determining a distance to the subject among the plurality of sensors based on the collected sensor information,

obtaining a first information from the selected first sensor and a second information from the selected second sensors, and

focusing on the subject located in an image collected from the camera using the obtained first information and second information,

wherein the collected sensor information comprises at least one of a photographing environment, a characteristic of a sensor, or a photographing mode, and

wherein the selecting of the first sensor and the second sensor comprises:

calculating an accuracy point and a weight of each of the plurality of sensors based on the collected sensor information, and

selecting, as at least one focusing sensor, the first sensor and the second sensor among the plurality of sensors, having a highest value based on the calculated accuracy point and weight.

2. The method of claim 1 , wherein the focusing on the subject comprises:

determining a reference subject in the image collected from the camera,

determining a direction of the reference subject using the first sensor,

setting a region of interest (ROI) for executing re-focusing with respect to the direction of the reference subject, and

executing focusing by determining a distance from the ROI to the reference subject using the first sensor.

3. The method of claim 1 , wherein the calculating of the accuracy point and the weight of the sensor information comprises:

calculating the accuracy point of the collected sensor information according to photographing environment information, and

calculating the weight of the sensor information according to a photographing mode of the camera.

4. The method of claim 1 , wherein the sensor information comprises:

at least one first sensor information that is collected from among a quantity of light, an image, a speed, a sound, and a location, and

at least one second sensor information that is collected from among motion recognition, movement recognition, facial recognition, voice detection, edge detection, symbol recognition, direction recognition, and location measurement, by processing the first sensor information.

5. The method of claim 1 , wherein the focusing on the subject comprises executing focusing when both the camera supports a half-press shutter function and a user input that requests execution of the half-press shutter function is detected.

6. The method of claim 1 , wherein the plurality of sensors includes at least one of a touch sensor that recognizes a touch input, a proximity sensor that senses a proximity of an external object, a distance measuring sensor, an image sensor that collects an image, a motion recognition sensor that recognizes a motion and a movement in a three-Dimensional (3D) space, a direction measuring sensor that senses the direction of the subject, or an acceleration sensor that detects a moving speed.

7. The method of claim 1 , further comprising:

detecting feature information from among the collected sensor information,

wherein the feature information comprises at least one of an eye pattern recognition information indicating a direction at which a user gazes, sound localization information, symbol recognition information, facial recognition information, or edge detection information.

8. An electronic device comprising:

a camera configured to collect an image including a subject;

a sensor configured to collect photographing environment information, and to collect a plurality of pieces of sensor information by processing the photographing environment information when the camera is driven; and

at least one processor configured to:

collect sensor information using a plurality of sensors of the electronic device when the camera of the electronic device is driven,

select a first sensor for determining a direction of a subject and second sensor for determining a distance to the subject among the plurality of sensors, based on the collected sensor information,

obtain a first information from the selected first sensor and a second information from the selected second sensor, and

focus on the subject located in an image collected from the camera using the obtained first information and second information,

wherein the collected sensor information comprises at least one of a photographing environment, a characteristic of a sensor, or a photographing mode, and

wherein the at least one processor is further configured to:

calculate an accuracy point and a weight of each of the plurality of sensors based on the collected sensor information, and

select, as at least one focusing sensor, the first sensor and the second sensor, from among the plurality of sensors, having a highest value based on the calculated accuracy point and the weight.

9. The electronic device of claim 8 , wherein the at least one processor is further configured to:

determine a reference subject in the image collected from the camera,

set a region of interest (ROI) for executing re-focusing with respect to the direction of the reference subject, and

execute focusing by determining a distance from the ROI to the reference subject using the first sensor.

10. The electronic device of claim 8 , wherein the at least one processor is further configured to:

calculate an accuracy point of the collected sensor information according to photographing environment information, and

calculate the weight of the sensor information according to a photographing mode of the camera.

11. The electronic device of claim 8 , wherein the sensor information comprises:

at least one first sensor information that is collected from among a quantity of light, an image, a speed, a sound, and a location, and

at least one second sensor information that is collected from among motion recognition, movement recognition, facial recognition, voice detection, edge detection, symbol recognition, direction recognition, and location measurement by processing the first sensor information.

12. The electronic device of claim 8 , wherein the at least one processor is further configured to control the focusing on the subject when both the electronic device supports a half-press shutter function and a user input that requests execution of the half-press shutter function is detected.

13. The electronic device of claim 8 , wherein the at least one processor is further configured to:

detect a sound of a subject using a stereo microphone, and

measure a distance to the subject using a triangulation scheme.

14. The electronic device of claim 8 , wherein, when a location of another communication terminal is determined to be within an interval defined in advance, the at least one processor is further configured to calculate the location of the other communication terminal so as to measure a direction and a distance of the subject.

15. The electronic device of claim 8 , wherein, when the electronic device is equipped with two photographing devices, the at least one processor is further configured to execute recognition of an eye pattern so as to set a region of interest (ROI) based on a gaze of an eye of a person who executes photographing by the electronic device.

16. The electronic device of claim 8 , wherein the sensor comprises:

a plurality of sensors including at least one of a touch sensor that recognizes a touch input,

a proximity sensor that senses a proximity of an external object,

a distance measuring sensor,

an image sensor that collects an image,

a motion recognition sensor that recognizes a motion and a movement in a three-Dimensional (3D) space,

a direction sensor that senses a direction, and

an acceleration sensor that detects a moving speed.

17. The electronic device of claim 8 ,

wherein the at least one processor is further configured to detect feature information from among the collected sensor information, and

wherein the feature information comprises at least one of an eye pattern recognition information indicating a direction at which a user gazes, sound localization information, symbol recognition information, facial recognition information, and edge detection information.