Imaging device, imaging system, and method of controlling imaging device

1. An imaging device, comprising:

circuitry configured to:

detect a plurality of wide-angle-side color components in each of a first plurality of regions in wide-angle image data, wherein the wide-angle image data has a first angle of view wider than a determined value;

detect a plurality of telephoto-side color components in each of a second plurality of regions in telephoto image data, wherein the telephoto image data has a second angle of view narrower than the determined value;

calculate a wide-angle-side integration ratio based on a ratio of respective integration values of the plurality of wide-angle-side color components and the plurality of telephoto-side color components;

obtain a telephoto-side white balance gain for the telephoto image data based on the wide-angle-side integration ratio; and

correct the telephoto image data based on the telephoto-side white balance gain.

2. The imaging device according to claim 1 , wherein the circuitry is further configured to:

set a telephoto-side integration range that includes the wide-angle-side integration ratio; and

calculate the telephoto-side white balance gain based on a telephoto-side integration ratio, wherein the telephoto-side integration ratio is a ratio of respective integration values of the plurality of telephoto-side color components within the telephoto-side integration range.

3. The imaging device according to claim 2 , wherein

the plurality of telephoto-side color components includes a red (R) component, a green (G) component, and a blue (B) component, and

the circuitry is further configured to set the telephoto-side integration range based on a shape centered on the wide-angle-side integration ratio in an orthogonal coordinate system having a ratio of the R component and the G component and a ratio of the B component and the G component as coordinate axes.

4. The imaging device according to claim 3 , wherein the telephoto-side integration range is rectangular.

5. The imaging device according to claim 3 , wherein the telephoto-side integration range is circular.

6. The imaging device according to claim 3 , wherein the telephoto-side integration range is elliptical.

7. The imaging device according to claim 3 ,

wherein the circuitry is further configured to:

calculate the wide-angle-side integration ratio based on a ratio of respective integration values of the plurality of wide-angle-side color components within a wide-angle-side integration range;

acquire a wide-angle-side white balance gain based on the wide-angle-side integration ratio; and

correct the wide-angle image data based on the wide-angle-side white balance gain.

8. The imaging device according to claim 7 , wherein

a side of the telephoto-side integration range is parallel to a side of the wide-angle-side integration range.

9. The imaging device according to claim 2 , wherein

the plurality of telephoto-side color components includes a red (R) component, a green (G) component, and a blue (B) component, and

the circuitry is further configured to set the telephoto-side integration range based on an overlapping range between a range having a shape centered on the wide-angle-side integration ratio and a preset reference integration range in an orthogonal coordinate system having a ratio of the R component and the G component and a ratio of the B component and the G component as coordinate axes.

10. The imaging device according to claim 7 , wherein the circuitry is further configured to:

determine presence or absence of reliability of the plurality of wide-angle-side color components within the wide-angle-side integration range; and

calculate the wide-angle-side integration ratio based on the presence of the reliability.

11. The imaging device according to claim 10 , wherein the circuitry is further configured to:

determine a result based on a determination whether a number of color components of the plurality of wide-angle-side color components that exceeds a threshold value is larger than a threshold number; and

determine the presence or absence of the reliability based on the result.

12. The imaging device according to claim 10 , wherein the circuitry is further configured to:

determine the presence or absence of the reliability of the plurality of telephoto-side color components within the telephoto-side integration range; and

calculate the telephoto-side integration ratio based on the presence of the reliability.

13. The imaging device according to claim 12 , wherein the circuitry is further configured to:

determine a result based on a determination whether a number of color components of the plurality of telephoto-side color components that exceeds a threshold is larger than a threshold number; and

determine the presence or absence of the reliability based on the result.

14. An imaging system, comprising:

circuitry configured to:

detect a plurality of wide-angle-side color components in each of a first plurality of regions in wide-angle image data, wherein the wide-angle image data has a first angle of view wider than a value;

detect a plurality of telephoto-side color components in each of a second plurality of regions in telephoto image data, wherein the telephoto image data has a second angle of view narrower than the value;

calculate a wide-angle-side integration ratio based on a ratio of respective integration values of the plurality of wide-angle-side color components and the plurality of telephoto-side color components;

obtain a telephoto-side white balance gain for the telephoto image data based on the wide-angle-side integration ratio; and

correct the telephoto image data based on the telephoto-side white balance gain; and

a recording unit configured to record the corrected telephoto image data.

15. A method of controlling an imaging device, comprising:

detecting a plurality of wide-angle-side color components in each of a first plurality of regions in wide-angle image data, wherein the wide-angle image data has a first angle of view wider than a value;

detecting a plurality of telephoto-side color components in each of a second plurality of regions in a telephoto image data, wherein the telephoto image data has a second angle of view narrower than the value;

calculating a wide-angle-side integration ratio based on a ratio of respective integration values of the plurality of wide-angle-side color components and the plurality of telephoto-side color components;

obtaining a telephoto-side white balance gain for the telephoto image data based on the wide-angle-side integration ratio; and

correcting the telephoto image data based on the telephoto-side white balance gain.

16. An imaging device, comprising:

circuitry configured to:

detect a plurality of wide-angle-side color components in each of a first plurality of regions in wide-angle image data, wherein the wide-angle image data has a first angle of view wider than a value;

detect a plurality of telephoto-side color components in each of a second plurality of regions in telephoto image data, wherein the telephoto image data has a second angle of view narrower than the value;

obtain a telephoto-side white balance gain for the telephoto image data based on a wide-angle-side integration ratio, wherein the wide-angle-side integration ratio is a ratio of respective integration values of the plurality of wide-angle-side color components and the plurality of telephoto-side color components;

set a telephoto-side integration range that includes the wide-angle-side integration ratio;

calculate the telephoto-side white balance gain based on a telephoto-side integration ratio, wherein the telephoto-side integration ratio is a ratio of respective integration values of the plurality of telephoto-side color components within the telephoto-side integration range; and

correct the telephoto image data based on the telephoto-side white balance gain.