Apparatus and method for displaying image in virtual space

1. An information processing apparatus comprising:

one or more processors; and

one or more memories storing instructions, when executed by the one or more processors, causing the information processing apparatus to:

acquire viewpoint information concerning a viewer;

input virtual space data;

specify a virtual reference surface corresponding to a real reference surface in the virtual space data;

determine positional relationship between the virtual reference surface and the real reference surface;

correct the virtual space data based on the positional relationship; generate a display image based on the corrected virtual space data and the viewpoint information;

present a plurality of candidates of the reference surface in the virtual space on a display which the viewer is able to see;

present real space information indicating each of the plurality of candidates of the reference surface on the display which the viewer is able to see; and

select, as the reference surface in the virtual space, a candidate selected from the plurality of candidates on the basis of instruction of the viewer.

2. The information processing apparatus according to claim 1 , when executed by the one or more processors, further causing the information processing apparatus to:

extract at least one bottom surface from the virtual space data; and

select, from the extracted at least one bottom surface, a bottom surface as the reference surface in the virtual space.

3. The information processing apparatus according to claim 2 , wherein, based on a distance between the real reference surface and the extracted at least one bottom surface, the bottom surface as the reference surface in the virtual space is selected.

4. The information processing apparatus according to claim 2 , wherein, based on number of vertices of each of the extracted at least one bottom surface, the bottom surface as the reference surface in the virtual space is selected.

5. The information processing apparatus according to claim 2 , wherein, based on an area of each of the extracted at least one bottom surface, the bottom surface as the reference surface in the virtual space is selected.

6. The information processing apparatus according to claim 2 , wherein a surface with a normal line extending vertically upward as the bottom surface is extracted.

7. The information processing apparatus according to claim 6 , wherein, as the bottom surface, a surface with the normal line extending vertically upward and having a distance longer or equal to a predetermined length from a closest one of surfaces with the normal line extending vertically downward is extracted.

8. The information processing apparatus according to claim 1 , wherein the viewpoint information based on an image captured is acquired.

9. The information processing apparatus according to claim 1 , wherein the viewpoint information includes a position of a viewpoint of the viewer.

10. The information processing apparatus according to claim 1 , wherein the viewpoint information includes an orientation of a viewpoint of the viewer.

11. The information processing apparatus according to claim 1 , wherein the reference surface is a floor surface.

12. The information processing apparatus according to claim 1 , wherein data on the virtual space based on a distance between the reference surface in the virtual space and the reference surface in the real space is shifted.

13. The information processing apparatus according to claim 1 , when executed by the one or more processors, further causing the information processing apparatus to input a captured image in the real space, and

wherein the display image by combining the corrected virtual space data and the captured image in the real space is generated.

14. An information processing method comprising:

acquiring viewpoint information concerning a viewer;

inputting virtual space data; specifying a virtual reference surface corresponding to a real reference surface in the virtual space data;

determining positional relationship between the virtual reference surface and the real reference surface;

correcting the virtual space data based on the positional relationship; generating a display image based on the corrected virtual space data and the viewpoint information;

presenting a plurality of candidates of the reference surface in the virtual space on a display which the viewer is able to see;

presenting real space information indicating each of the plurality of candidates of the reference surface on the display which the viewer is able to see; and

selecting, as the reference surface in the virtual space, a candidate selected from the plurality of candidates on the basis of instruction of the viewer.

15. A non-transitory computer-readable storage medium storing computer-executable instructions for causing a computer to implement an information processing method, the information processing method comprising:

acquiring viewpoint information concerning a viewer;

inputting virtual space data;

specifying a virtual reference surface corresponding to a real reference surface in the virtual space data;

determining positional relationship between the virtual reference surface and the real reference surface;

correcting the virtual space data based on the positional relationship;

generating a display image based on the corrected virtual space data and the viewpoint information;

presenting a plurality of candidates of the reference surface in the virtual space on a display which the viewer is able to see;

presenting real space information indicating each of the plurality of candidates of the reference surface on the display which the viewer is able to see; and

selecting, as the reference surface in the virtual space, a candidate selected from the plurality of candidates on the basis of instruction of the viewer.