1. A method of local image enhancement, the method comprising: determining a localized portion associated with a subtracted x-ray image having a high x-ray absorption as a function of an x-ray absorption associated with either a native or a mask image used to generate the subtracted x-ray image; and altering the localized portion to compensate for the high absorption such that visibility of an interventional object or an area of a vessel as shown in the subtracted x-ray image is enhanced.