Image processing apparatus, method, and non-transitory computer-readable medium for rendering a virtual viewpoint image

A method comprising:

• obtaining images acquired based on image capturing for a target area from a plurality of directions by a plurality of image capturing devices;
• obtaining viewpoint information indicating a position of a virtual viewpoint;
• determining, based on a positional relationship between a reference position within the target area and the position of the virtual viewpoint indicated by the obtained viewpoint information, a parameter indicating a size of a constituent element of a three-dimensional model which is data indicating a shape of an object within the target area;
• generating a three-dimensional model based on the obtained images and the size of the constituent element according to the determined parameter;
• and
• generating a virtual viewpoint image based on the generated three-dimensional model and the obtained viewpoint information.

A non-transitory computer-readable medium storing a computer program comprising instructions which, when the program is executed by a computer, cause the computer to perform:

• obtaining images acquired based on image capturing for a target area from a plurality of directions by a plurality of image capturing devices;
• obtaining viewpoint information indicating a position of a virtual viewpoint;
• determining, based on a positional relationship between a reference position within the target area and the position of the virtual viewpoint indicated by the obtained viewpoint information, a parameter indicating a size of a constituent element of a three-dimensional model which is data indicating a shape of an object within the target area;
• generating a three-dimensional model based on the obtained images and the size of the constituent element according to the determined parameter;
• and
• generating a virtual viewpoint image based on the generated three-dimensional model and the obtained viewpoint information.