1. A method of generating an X-ray image, the method comprising: obtaining the X-ray image of an object which includes a tissue of interest and an interference target region that are disposed together within the object, the obtaining the X-ray image of the object including: obtaining a pre-shot X-ray image of the object by radiating X-rays onto the object, setting an imaging condition based on tissue characteristics of the object in an area of the object other than the interference target region, in the pre-shot X-ray image, and obtaining a main shot X-ray image of the object by radiating the X-rays being generated based on the imaging condition which has been set through the pre-shot X-ray image; performing an image analysis on the tissue of interest in the area of the object other than the interference target region, in the main shot X-ray image; applying image processing to an entirety of the main shot X-ray image based on information on the image analysis of the tissue of interest, the entirety of the main shot X-ray image including the tissue of interest and the interference target region; and generating a final X-ray image based on the main shot X-ray image to which the image processing has been applied.