Method for correcting shaking during shooting and electronic device therefor
An electronic device according to an embodiment comprises: a lens assembly including one or more lenses aligned along an optical axis; an auto focus (AF) module comprising circuitry configured to move the lens assembly in the direction of the optical axis; an optical image stabilization (OIS) module comprising circuitry configured to move the lens assembly in a plane perpendicular to the optical axis, wherein the OIS module includes a unit correction section based on a driving range of the OIS module, a movement range of the lens assembly in the plane according to driving of the AF module, and a resolution of the OIS module; an image sensor configured to acquire light passing through the lens assembly; a motion sensor; and at least one processor, comprising processing circuitry, electrically connected to the AF module, the OIS module, the image sensor, and the motion sensor, wherein at least one processor, individually and/or collectively, may be configured to: detect a motion of the electronic device using the motion sensor; drive the image sensor to recognize a subject; control the AF module so that the lens assembly moves to a first position on the optical axis based on the position of the subject; and control the OIS module to perform OIS based on the movement of the electronic device, the first position of the lens assembly, and the unit correction section of the OIS module.
1 . An electronic device comprising:
a lens assembly comprising at least one lens aligned along an optical axis;
an auto focus (AF) module comprising circuitry configured to move the lens assembly in the direction of the optical axis;
an optical image stabilization (OIS) module comprising circuitry configured to move the lens assembly in a plane perpendicular to the optical axis, the OIS module including a unit correction section based on a driving range of the OIS module, a movement range of the lens assembly in the plane dependent on driving of the AF module, and a resolution of the OIS module;
an image sensor configured to acquire light passing through the lens assembly;
a motion sensor; and
at least one processor, comprising processing circuitry,
wherein the at least one processor is configured to:
detect a motion of the electronic device using the motion sensor;
drive the image sensor and recognize a subject;
control the AF module to move the lens assembly to a first position on the optical axis, based on a position of the subject; and
control the OIS module to perform OIS, based on the motion of the electronic device, the first position of the lens assembly, and the unit correction section of the OIS module.
2 . The electronic device of claim 1 , wherein, based on the resolution of the OIS module being N bits, the unit correction section is calculated by dividing a sum of the driving range and the movement range by 2{circumflex over ( )}N.
3 . The electronic device of claim 1 , wherein the OIS module comprises a memory, and
the unit correction section is stored in the memory.
4 . The electronic device of claim 1 , wherein the motion sensor comprises at least one of an acceleration sensor and a gyro sensor, and
the at least one processor is configured to acquire motion data corresponding to the motion of the electronic device through the motion sensor.
5 . The electronic device of claim 1 , further comprising a Hall sensor,
wherein the at least one processor is configured to:
acquire, through the Hall sensor, a Hall voltage provided from a movement of the lens assembly; and
identify the first position of the lens assembly through the Hall sensor.
6 . The electronic device of claim 1 , wherein the driving range of the OIS module is a maximum driving range in which the electronic device performs OIS.
7 . The electronic device of claim 1 , wherein the at least one processor is configured to acquire at least one image frame on which OIS is performed, through the image sensor.
8 . The electronic device of claim 1 , wherein an actuator of the OIS module is configured to be driven in a ball guide method.
9 . A method of operating an electronic device, the method comprising:
detecting a motion of the electronic device using a motion sensor;
driving an image sensor and recognizing a subject;
controlling an auto focus (AF) module to move a lens assembly comprising at least one lens along an optical axis to a first position on the optical axis, based on a position of the subject; and
performing optical image stabilization (OIS), based on the motion of the electronic device, the first position of the lens assembly, and a unit correction section of an OIS module,
wherein the OIS module moves the lens assembly in a plane perpendicular to the optical axis, and includes the unit correction section based on a driving range of the OIS module, a movement range of the lens assembly in the plane dependent on driving of the AF module, and a resolution of the OIS module.
10 . The method of operating the electronic device of claim 9 , comprising, based on the resolution of the OIS module being N bits, dividing a sum of the driving range and the movement range by 2{circumflex over ( )}N and calculating the unit correction section.
11 . The method of operating the electronic device of claim 10 , comprising storing the calculated unit correction section in a memory of the OIS module.
12 . The method of operating the electronic device of claim 9 , comprising acquiring motion data corresponding to the motion of the electronic device through the motion sensor comprising at least one of an acceleration sensor and a gyro sensor.
13 . The method of operating the electronic device of claim 9 , comprising:
acquiring, through a Hall sensor, a Hall voltage provided from a movement of the lens assembly; and
identifying at least one of a position and direction of the lens assembly through the Hall sensor.
14 . The method of operating the electronic device of claim 9 , wherein the driving range of the OIS module is a maximum driving range in which the electronic device performs OIS.
15 . The method of operating the electronic device of claim 9 , comprising acquiring at least one image frame on which OIS is performed, through the image sensor.