1. A display method comprising: generating a first depth map and an edge map according to a color image; determining a first depth value of a first pixel and a second depth value of a second pixel of an edge region of the first depth map according to the edge map, the first pixel and the second pixel being arranged in a horizontal direction and adjacent to each other; adjusting N depth values of N pixels adjacent to the edge region of the first depth map according to a zero parallax setting reference level to generate a second depth map, where N is a positive integer, and the N pixels comprise at least one of the first pixel and the second pixel; and generating multi-view images according to the second depth map and the color image to display a three-dimensional image.