Image processing apparatus, image processing method, and storage medium, relating to generating an image corresponding to a predetermined three-dimensional shape by transforming a captured image

1. An image processing apparatus comprising:

one or more processors; and

one or more memories storing instructions that, when executed by the one or more processors, cause the image processing apparatus to perform operations comprising:

acquiring information for identifying a position of a vertex of a plane in a captured image, the captured image including a structure composed of a plurality of planes as an object;

identifying points corresponding to positions of vertexes of the plane on a spherical coordinate that corresponds to an image-capturing range of an image-capturing unit that captures the captured image based on the information acquired by the acquiring;

correcting positions of the points on the spherical coordinate to form a three-dimensional shape having the points on the spherical coordinate as the vertexes, into a predetermined three-dimensional shape; and

generating an overhead image by making a region in the captured image corresponding to the positions of the points corrected by the correcting, as a region corresponding to the plane.

2. The image processing apparatus according to claim 1 , wherein the correcting corrects the positions of the points on the spherical coordinate to form the three-dimensional shape having the points on the spherical coordinate as the vertexes into a rectangular parallelepiped.

3. The image processing apparatus according to claim 1 , wherein the operations further comprise:

storing information of a plurality of three-dimensional shapes, and

selecting a predetermined three-dimensional shape from the plurality of the three-dimensional shapes.

4. The image processing apparatus according to claim 3 , wherein the selecting selects the predetermined three-dimensional shape based on a number of points corresponding to the positions of the vertexes of the plane.

5. The image processing apparatus according to claim 1 , wherein the generating corrects images of regions corresponding to a plurality of planes in the captured image so that the images correspond to the planes of the predetermined three-dimensional shape formed by connecting the plurality of the points corrected by the correcting.

6. The image processing apparatus according to claim 1 , wherein the acquiring acquires a position specified by a user with respect to the captured image as the information for identifying a position of the plane.

7. The image processing apparatus according to claim 1 , wherein the acquiring detects an object having a predetermined color or pattern from the captured image and acquires a position of the object having the predetermined color or pattern as the information for identifying a position of the plane.

8. The image processing apparatus according to claim 1 , wherein the generating generates the overhead image on which an image representing a position of the image-capturing unit for capturing the captured image is superimposed.

9. The image processing apparatus according to claim 1 , wherein the generating generates the overhead image on which an image representing an image-capturing direction of the image-capturing unit for capturing the captured image is superimposed.

10. The image processing apparatus according to claim 1 , wherein the operations further comprise transmitting the overhead image generated by the generating to the image-capturing unit for capturing the captured image, via a network.

11. An image processing method comprising:

acquiring information for identifying a position of a vertex of a plane in a captured image, the captured image including a structure composed of a plurality of planes as an object;

identifying points corresponding to positions of vertexes of the plane on a spherical coordinate that corresponds to an image-capturing range of an image-capturing unit that captures the captured image based on the information acquired by the acquiring,

correcting positions of the points on the spherical coordinate to form a three-dimensional shape having the points on the spherical coordinate as the vertexes, into a predetermined three-dimensional shape; and

generating an overhead image by making a region in the captured image corresponding to the positions of the points corrected by the correcting, as a region corresponding to the plane.

12. A non-transitory computer readable storage medium storing a program that, when executed, causes a computer to perform a process comprising:

acquiring information for identifying a position of a vertex of a plane in a captured image, the captured image including a structure composed of a plurality of planes as an object;

identifying points corresponding to positions of vertexes of the plane on a spherical coordinate that corresponds to an image-capturing range of an image-capturing unit that captures the captured image based on the information acquired by the acquiring,

correcting positions of the points on the spherical coordinate to form a three-dimensional shape having the points on the spherical coordinate as the vertexes, into a predetermined three-dimensional shape; and

generating an overhead image by making a region in the captured image corresponding to the positions of the points corrected by the correcting, as a region corresponding to the plane.