1. An image processing apparatus, for generating coordination calibration points, for generating a plurality of coordination calibration points according to a first image, a second image, and a third image, the image processing apparatus comprising: a subtracting module for subtracting the first image from the second image to generate a first subtracted image and subtracting the first image from the third image to generate a second subtracted image; an edge detection module, coupled to the subtracting module, for performing an edge detection process for the first subtracted image to generate a first edge image and performing the edge detection process for the second subtracted image to generate a second edge image, wherein the first edge image comprises a first edge and the second edge image comprises a second edge; and an intersection point generation module, coupled to the edge detection module, for generating an intersection point pixel according to the first edge and the second edge, the intersection point pixel serving as a coordination calibration point corresponding to the first edge and the second edge.