Image processing apparatus, imaging apparatus, control methods thereof, and storage medium for generating a display image based on a plurality of viewpoint images

1. An image processing apparatus comprising:

at least one processor or circuit configured to perform the operations of following units:

an obtaining unit configured to obtain a plurality of viewpoint images having parallax in a predetermined direction;

an operating unit configured to accept a viewpoint changing operation; and

a processing unit configured to generate, based on the plurality of viewpoint images, a display image by changing a viewpoint in accordance with the viewpoint changing operation,

a display control unit configured to display the display image and a notation indicating a viewpoint changing direction in accordance with the viewpoint changing operation on a display device,

wherein, in a case where the display image whose viewpoint can be changed in the predetermined direction is rotated and displayed at different angle, the display control unit changes the notation in accordance with a direction in which viewpoint can be changed on the display image that is rotated and displayed at the different angle.

2. The image processing apparatus according to claim 1 , wherein in a case where the display image can be generated by changing the viewpoint in the predetermined direction based on the plurality of viewpoint images, the operating unit accepts the viewpoint changing operation along the predetermined direction.

3. The image processing apparatus according to claim 2 , wherein the operating unit accepts the viewpoint changing operation, such that the change in viewpoint in the predetermined direction increases as a position moves away from a predetermined position in the predetermined direction, and the change in viewpoint increases in a direction opposite to the predetermined direction as a position moves away to an opposite side from the predetermined position along the predetermined direction.

4. The image processing apparatus according to claim 2 , wherein a predetermined direction is a horizontal direction or a vertical direction.

5. The image processing apparatus according to claim 4 , wherein in a case where displaying, in a vertical position, the display image whose viewpoint can be changed in a horizontal direction in a horizontal position, the operating unit accepts the viewpoint changing operation in a vertical direction.

6. The image processing apparatus according to claim 5 ,

wherein the display control unit changes the notation in accordance with a direction in which the operating unit accepts the viewpoint changing operation.

7. The image processing apparatus according to claim 1 , wherein the operating unit accepts the viewpoint changing operation in a state in which a display image based on the plurality of viewpoint images is displayed.

8. The image processing apparatus according to claim 1 , wherein:

the operating unit further accepts an operation of changing a degree of edge enhancement in the display image, and

the processing unit performs edge enhancement on a focused region in the display image in accordance with the degree of edge enhancement.

9. The image processing apparatus according to claim 1 , wherein the processing unit generates the display image by changing a weight for adding the plurality of viewpoint images in accordance with the viewpoint changing operation, and adding the plurality of viewpoint images by using the weight.

10. The image processing apparatus according to claim 1 , wherein

the operating unit further accepts a focus position changing operation, and

the display control unit displays the display image whose focus position is changed in accordance with the focus position changing operation on the display device.

11. The image processing apparatus according to claim 10 , wherein in a case where the display image can be generated by changing the viewpoint in the predetermined direction based on the plurality of viewpoint images, the operating unit accepts the focus position changing operation along a direction different from the predetermined direction.

12. The image processing apparatus according to claim 11 , wherein the operation unit accepts the focus position changing operation, such that the change in focus position increases as the focus position changing operation moves away from a predetermined position in an operation accepting direction.

13. The image processing apparatus according to claim 10 , wherein the processing unit generates the display image by changing a shift amount between the plurality of viewpoint images in accordance with the focus position changing operation, and adding the plurality of viewpoint images shifted by the shift amount.

14. An imaging apparatus comprising:

an image sensor in which pixels each including a plurality of subpixels are two-dimensionally arranged, and which outputs a plurality of viewpoint images having parallax in a predetermined direction; and

at least one processor or circuit configured to perform the operations of following units:

an operating unit configured to accept a viewpoint changing operation; and

a processing unit configured to generate, based on the plurality of viewpoint images, a display image by changing a viewpoint in accordance with the viewpoint changing operation, and

a display control unit configured to display the display image and a notation indicating a viewpoint changing direction in accordance with the viewpoint changing operation on a display device,

wherein in the image sensor, the plurality of subpixels are arranged in a predetermined direction in the pixel, and

in a case where the display image whose viewpoint can be changed in the predetermined direction is rotated and displayed at different angle, the display control unit changes the notation in accordance with a direction in which viewpoint can be changed on the display image that is rotated and displayed at the different angle.

15. The imaging apparatus according to claim 14 , wherein in a case where the display image is displayed in the horizontal position based on the plurality of viewpoint images captured in a horizontal position by using the imaging apparatus, the operating unit accepts the viewpoint changing operation along the predetermined direction, and in a case where the display image is displayed in a vertical position based on the plurality of viewpoint images captured in the horizontal position, the operating unit accepts the viewpoint changing operation along a direction perpendicular to the predetermined direction.

16. The imaging apparatus according to claim 15 ,

wherein the display control unit changes the notation in accordance with a rotational angle from a vertical position or a horizontal position in which the plurality of viewpoint images are captured.

17. A control method of an image processing apparatus, comprising:

obtaining a plurality of viewpoint images having parallax in a predetermined direction;

accepting a viewpoint changing operation;

generating, based on the plurality of viewpoint images, a display image by changing a viewpoint in accordance with the viewpoint changing operation, and

controlling display of the display image and a notation indicating a viewpoint changing direction in accordance with the viewpoint changing operation on a display device,

wherein, in a case where the display image whose viewpoint can be changed in the predetermined direction is rotated and displayed at different angle, the controlling includes changing the notation in accordance with a direction in which viewpoint can be changed on the display image that is rotated and displayed at the different angle.

18. A control method of an imaging apparatus comprising an image sensor in which pixels each including a plurality of subpixels are two-dimensionally arranged, and which outputs a plurality of viewpoint images having parallax in a predetermined direction, comprising:

obtaining the plurality of viewpoint images output from the image sensor;

accepting a viewpoint changing operation and

generating, based on the plurality of viewpoint images, a display image by changing a viewpoint in accordance with the viewpoint changing operation, and

controlling display of the display image and a notation indicating a viewpoint changing direction in accordance with the viewpoint changing operation on a display device,

wherein in the image sensor, the plurality of subpixels are arranged in a predetermined direction in the pixel, and

wherein, in a case where the display image whose viewpoint can be changed in the predetermined direction is rotated and displayed at different angle, the controlling includes changing the notation in accordance with a direction in which viewpoint can be changed on the display image that is rotated and displayed at the different angle.

19. A non-transitory computer-readable storage medium storing a program for causing a computer to execute a control method of an image processing apparatus comprising an image sensor in which pixels each including a plurality of subpixels are two-dimensionally arranged, and which outputs a plurality of viewpoint images having parallax in a predetermined direction, comprising:

obtaining the plurality of viewpoint images output from the image sensor;

accepting a viewpoint changing operation;

generating, based on the plurality of viewpoint images, a display image by changing a viewpoint in accordance with the viewpoint changing operation, and

controlling display of the display image and a notation indicating a viewpoint changing direction in accordance with the viewpoint changing operation on a display device,

wherein in the image sensor, the plurality of subpixels are arranged in a predetermined direction in the pixel, and

wherein, in a case where the display image whose viewpoint can be changed in the predetermined direction is rotated and displayed at different angle, the controlling includes changing the notation in accordance with a direction in which viewpoint can be changed on the display image that is rotated and displayed at the different angle.