Control device, control method and electronic device

1. A control device, comprising:

circuitry configured to:

calculate a focus position of each of a plurality of phase difference detection regions of an image of a subject, wherein the image is captured by an imaging element via a focus lens;

determine the subject is on one of an infinity side or a macro side based on the calculated focus position of each of the plurality of phase difference detection regions;

calculate an average value of focus positions of a set of phase difference detection regions of the plurality of phase difference detection regions, wherein

the focus positions of the set of phase difference detection regions are in a specific range, and

the focus positions of the set of phase difference detection regions are on the one of the infinity side or the macro side; and

determine a position of the focus lens based on the calculated average value and the determination the subject is on the one of the infinity side or the macro side.

2. The control device according to claim 1 , wherein

the circuitry is further configured to determine the subject is on the one of the infinity side or the macro side based on a count of phase difference detection regions in the set of phase difference detection regions, and

the count is more than or equal to a specific threshold.

3. The control device according to claim 1 , wherein

each of the plurality of phase difference detection regions includes a first region and a plurality of second regions, and

at least a part of each of the plurality of second regions overlaps with the first region.

4. A control device, comprising:

circuitry configured to:

calculate a focus position of each of a plurality of phase difference detection regions of an image of a subject, wherein the image is captured by an imaging element via a focus lens;

determine the subject is on one of an infinity side or a macro side based on a count of phase difference detection regions in a set of phase difference detection regions of the plurality of phase difference detection regions, wherein

the count is more than or equal to a specific value, and

the focus position of each phase difference detection region of the set of phase difference detection regions is outside a specific range from the focus position of a reference phase difference detection region of the plurality of phase difference detection regions; and

determine a position of the focus lens based on the determination the subject is on the one of the infinity side or the macro side.

5. A control device, comprising:

circuitry configured to:

calculate a focus position of each of a plurality of phase difference detection regions of a subject image, wherein the subject image is captured by an imaging element via a focus lens;

convert the calculated focus position of each of the plurality of phase difference detection regions into a histogram; and

determine a position of the focus lens based on

the focus position on one of an infinity side or a macro side, and

the converted focus position of each of the plurality of phase difference detection regions that satisfies a first specific condition.

6. The control device according to claim 5 , wherein

the first specific condition is based on a plurality of groups of adjacent unit elements in the histogram, and

a count of adjacent unit elements of each of the plurality of groups of adjacent unit elements is more than or equal to a specific value.

7. The control device according to claim 5 , wherein

the first specific condition is based on

a plurality of groups of unit elements in the histogram, wherein

a count of adjacent unit elements of each of the plurality of groups is more than or equal to a specific value, and

a count of unit elements of each of the plurality of groups of unit elements satisfies a second specific condition.

8. The control device according to claim 7 , wherein

in the second specific condition, a percentage of each of a first result and a second result is more than or equal to a specific value,

the first result is a sum of a count of unit elements in a first group of the plurality of groups and a count of unit elements in a second group of the plurality of groups,

the first group has a largest count of unit elements among the plurality of groups of the histogram,

the second group has a second largest count of unit elements among the plurality of groups of the histogram, and

the second result is a count of all unit elements in the histogram.

9. The control device according to claim 5 , wherein

the circuitry is further configured to smoothen the histogram of the focus position of each of the plurality of phase difference detection regions,

the first specific condition is based on a plurality of peaks in the smoothened histogram, and

a count of the plurality of peaks exceeds a specific threshold.

10. The control device according to claim 5 , wherein

the circuitry is further configured to:

add a specific time to the converted focus position of each of the plurality of phase difference detection regions in the histogram; and

smoothen the histogram of the focus position of each of the plurality of phase difference detection regions,

the first specific condition is based on a plurality of peaks in the smoothened histogram, and

a count of the plurality of peaks exceeds a specific threshold.

11. A control method, comprising:

calculating a focus position of each of a plurality of phase difference detection regions of an image of a subject, wherein the image is captured by an imaging element via a focus lens;

determining the subject is on one of an infinity side or a macro side based on the calculated focus position of each of the plurality of phase difference detection regions;

calculating an average value of focus positions of a set of phase difference detection regions of the plurality of phase difference detection regions, wherein

the focus positions of the set of phase difference detection regions are in a specific range, and

the focus positions of the set of phase difference detection regions are on the one of the infinity side or the macro side; and

determining a position of the focus lens based on the calculated average value and the determination the subject is on the one of the infinity side or the macro side.

12. A control method, comprising:

calculating a focus position of each of a plurality of phase difference detection regions of an image of a subject, wherein the image is captured by an imaging element via a focus lens;

determining the subject is on one of an infinity side or a macro side based on a count of phase difference detection regions in a set of phase difference detection regions of the plurality of phase difference detection regions, wherein

the count is more than or equal to a specific value, and

the focus position of each phase difference detection region of the set of phase difference detection regions is outside a specific range from the focus position of a reference phase difference detection region of the plurality of phase difference detection regions; and

determining a position of the focus lens based on the determination the subject is on the one of the infinity side or the macro side.

13. A control method, comprising:

calculating a focus position of each of a plurality of phase difference detection regions of a subject image, wherein the subject image is captured by an imaging element via a focus lens;

converting the calculated focus position of each of the plurality of phase difference detection regions into a histogram; and

determining a position of the focus lens based on

the focus position on one of an infinity side or a macro side, and

the converted focus position, of each of the plurality of phase difference detection regions, that satisfies a specific condition.

14. A non-transitory computer-readable medium having stored thereon computer-executable instructions that, when executed by a computer, cause the computer to execute operations, the operations comprising:

calculating a focus position of each of a plurality of phase difference detection regions of an image of a subject, wherein the image is captured by an imaging element via a focus lens;

determining the subject is on one of an infinity side or a macro side based on the calculated focus position of each of the plurality of phase difference detection regions;

calculating an average value of focus positions of a set of phase difference detection regions of the plurality of phase difference detection regions, wherein

the focus positions of the set of phase difference detection regions are in a specific range, and

the focus positions of the set of phase difference detection regions are on the one of the infinity side or the macro side; and

determining a position of the focus lens based on the calculated average value and the determination the subject is on the one of the infinity side or the macro side.

15. A non-transitory computer-readable medium having stored thereon computer-executable instructions that, when executed by a computer, cause the computer to execute operations, the operations comprising:

calculating a focus position of each of a plurality of phase difference detection regions of an image of a subject, wherein the image is captured by an imaging element via a focus lens;

determining the subject is on one of an infinity side or a macro side based on a count of phase difference detection regions in a set of phase difference detection regions of the plurality of phase difference detection regions, wherein

the count is more than or equal to a specific value, and

the focus position of each phase difference detection region of the set of phase difference detection regions is outside a specific range from the focus position of a reference phase difference detection region of the plurality of phase difference detection regions; and

determining a position of the focus lens based on the determination the subject is on one of the infinity side or the macro side.

16. A non-transitory computer-readable medium having stored thereon computer-executable instructions that, when executed by a computer, cause the computer to execute operations, the operations comprising:

calculating a focus position of each of a plurality of phase difference detection regions of a subject image, wherein the subject image is captured by an imaging element via a focus lens;

converting the calculated focus position of each of the plurality of phase difference detection regions into a histogram; and

determining a position of the focus lens based on

the focus position on one of an infinity side or a macro side, and

the converted focus position of each of the plurality of phase difference detection regions that satisfies a specific condition.

17. An electronic device, comprising:

an imaging optical system configured to collect light;

an imaging element configured to:

receive the light from the imaging optical system and capture an image of a subject; and

output a signal based on the captured image; and

circuitry configured to:

process the signal output by the imaging element;

calculate a focus position of each of a plurality of phase difference detection regions of the captured image, wherein the image is captured via a focus lens;

determine the subject is on one of an infinity side or a macro side based on the calculated focus position of each of the plurality of phase difference detection regions;

calculate an average value of focus positions of a set of phase difference detection regions of the plurality of phase difference detection regions, wherein

the focus positions of the set of phase difference detection regions are in a specific range, and

the focus positions of the set of phase difference detection regions are on the one of the infinity side or the macro side; and

determine a position of the focus lens based on the calculated average value and the determination the subject is on the one of the infinity side or the macro side.

18. An electronic device, comprising:

an imaging optical system configured to collect light;

an imaging element configured to:

receive the light from the imaging optical system and capture an image of a subject; and

output a signal based on the captured image; and

circuitry configured to:

process the signal output by the imaging element;

calculate a focus position of each of a plurality of phase difference detection regions of the captured image, wherein the image is captured via a focus lens;

determine the subject is on one of an infinity side or a macro side based on a count of phase difference detection regions in a set of phase difference detection regions of the plurality of phase difference detection regions, wherein

the count is more than or equal to a specific value, and

the focus position of each phase difference detection region of the set of phase difference detection regions is outside a specific range from the focus position of a reference phase difference detection region of the plurality of phase difference detection regions; and

determine a position of the focus lens based on the determination the subject is on one of the infinity side or the macro side.

19. An electronic device, comprising:

an imaging optical system configured to collect light;

an imaging element configured to:

receive the light from the imaging optical system and capture a subject image; and

output a signal based on the captured subject image; and

circuitry configured to:

process the signal output by the imaging element;

calculate a focus position of each of a plurality of phase difference detection regions based on the captured subject image, wherein the subject image is captured via a focus lens;

convert the calculated focus position of each of the plurality of phase difference detection regions into a histogram; and

determine a position of the focus lens based on

the focus position on one of an infinity side or a macro side, and

the converted focus position of each of the plurality of phase difference detection regions that satisfies a first specific condition.