1. A method of processing a sampled seismic trace representing information relating to a subsurface region, comprising: estimating Fourier coefficients of the seismic trace using a discrete Fourier transform; selecting from the estimated Fourier coefficients by applying a coherence criterion to the estimated Fourier coefficients to reduce an amount of aliased energy represented by the Fourier coefficients, wherein the coherence criterion is a measure of coherence to a line segment that crosses the origin in ω-k space; re-orthogonalizing, using a processor, in k-space, the selected coefficients; and using the re-orthogonalized coefficients to produce a seismic image of the subsurface region.