1. A method for a three-dimensional (3D) display system, comprising: obtaining a plurality of original images of a plurality of viewpoints in a 3D image; detecting a type of a display device for displaying the 3D image; determining a total number of required images based on the detected type of the display device; determining whether the total number of required images is equal to a total number of the plurality of original images; and when the total number of required images is not equal to the total number of the plurality of original images, adjusting the plurality of original images such that the total number of required images are provided.