1. An information processing method, comprising: obtaining an image captured by an image pickup unit; extracting a first index of which position is known and a second index of which position is unknown from the captured image; obtaining position and orientation information of the image pickup unit based on a position of the first index; determining a position of the second index based on the position and orientation information of the image pickup unit; determining a representative position of the extracted indices in the image based on the determined position of the extracted indices; determining, on the basis of the determined representative position of the extracted indices and of current position and orientation information of the image pickup unit, next position and orientation information of the image pickup unit to capture a next image including indices other than the extracted indices; and presenting the next position and orientation information of the image pickup unit to a user.