1. An X-ray imaging apparatus comprising: an X-ray generator to perform X-ray imaging of a target object by generating and irradiating X-rays; camera to capture an image of the target object; an image display to display the image of the target object captured by the camera; an input part to receive designation of a region for which segmentation imaging is to be performed on the image of the target object which is displayed on the image display; and a controller to control the X-ray generator to perform segmentation imaging based on the designated region of the image of the target object captured by the camera.