1. A method comprising: generating, by a system having a processor, different values of at least one migration parameter; applying, by the system, an imaging technique a plurality of times, wherein each application of the imaging technique uses a corresponding different one of the different values, and wherein each application of the imaging technique produces a corresponding image of a subterranean structure; and computing, by the system, an aggregate of the images to produce an output image of the subterranean structure.