1. A three-dimensional object display control system for rotating a three-dimensional object displayed on a screen, the system comprising: a rotatable sphere; a camera configured to acquire an image of the sphere; a rotation determiner configured to determine a rotation of the sphere based on the image of the sphere, wherein the rotation determiner comprises: a feature point setter configured to set at least two feature points in the image of the sphere; a feature point tracker configured to track the at least two feature points; a determiner configured to determine the rotation of the sphere based on the at least two feature points tracked by the feature point tracker; and a feature point resetter configured to determine whether a first distance in the image from a first feature point of the at least two feature points tracked by the feature point tracker to a center of the sphere is longer than a first predetermined distance and, in response to determination that the first distance is longer than the first predetermined distance, reset the first feature point, such that a second distance in the image from the first feature point to the center of the sphere is shorter than the first predetermined distance; and an object rotator configured to rotate the three-dimensional object based at least in part on the rotation determined by the rotation determiner.