1. A method for compensating for motion in an imaged object, the method comprising: obtaining nuclear medicine (NM) image data for an object acquired from an NM imaging system, the NM image data including single photon emission computed tomography (SPECT) image data; performing resolution recovery on the NM image data; reconstructing the resolution recovered NM image data into a plurality of subsets; morphing the reconstructed NM image data in at least one of the plurality of subsets, wherein the plurality of subsets of reconstructed NM image data correspond to NM images of gated phases of a cardiac cycle and the morphing comprises registering the NM images in different subsets to a selected gated NM image in one of the subsets by modifying a portion of the NM images to match a portion of the selected gated NM image to provide a similar geometry and registration; normalizing the NM image data based on a magnitude of the morphing; and summing the NM image data to generate an NM image compensated for motion of the object.