1. A method for a three-dimensional (3D) display system, comprising: obtaining a plurality of original images of a plurality of original viewpoints in a 3D image; detecting a type of a display device for displaying the 3D image; determining a total number of required images of required viewpoints 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 to achieve the required viewpoints of the display device, wherein adjusting the plurality of original images further includes: when the total number of required images is less than the total number of the plurality of original images, deleting a number of original images at edges of an actual display window such that the total number of required images are provided to achieve the required viewpoints of the display device; and when the total number of required images is greater than the total number of the plurality of original images, creating a number of auxiliary images based on the original images such that the total number of required images are provided to achieve the required viewpoints of the display device.