1. A seismic imaging method that comprises: obtaining shot gathers using an array of spaced-apart receivers, a seismic energy source, and position information sensors, wherein each shot gather includes seismic energy measurements corresponding to at least some of the spaced-apart receivers, and wherein each shot gather includes position information for the seismic energy source and for at least some of the spaced-apart receivers; obtaining, by at least one processor, partial images of the survey region using the shot gathers; stacking, by the at least one processor, the partial images to produce a reference image; and combining, by the at least one processor, the partial images to form an enhanced image, wherein the combining includes: measuring at each point the reference image's similitude to each of the partial images; and determining at each point an enhanced image value from a weighted combination of corresponding values in the partial images, the weighted combination using weights derived from the reference images' similitude at that point to each partial image; and displaying, by a display device, a visual representation of at least some portion of the enhanced image.