1. An image processing apparatus, comprising: an image data acquiring unit for acquiring ultrasound image data indicating information about an object; a database for storing a plurality of ultrasound reference images with respect to at least one standard plane, for information about human body regions; a search unit for recognizing information about a human body region of the object from the ultrasound image data, and searching for an ultrasound reference image, among the plurality of ultrasound reference images, corresponding to the recognized information about the human body region of the object; a standard image generating unit for generating an ultrasound standard image based on the recognized information about a human body region of the object from the ultrasound image data, regardless of a user's manipulation of probe orientation, by performing an image registration process on the ultrasound image data with the searched ultrasound reference image; and a display unit for displaying the generated ultrasound standard image.