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In this paper, we improve salt-body segmentation for 3-D seismic images by deforming the accurate boundary on a human-interpreted slice into the neighboring slices. The deformation not only honors the available boundary information on the input slice, but also preserves the shape information from the template slice. Field data examples show very promising results. Possible additional applications of this method include the seismic tomography problem, where horizon-picking needs to be done for each of several non-linear iterations; meanwhile, the seismic image changes only slightly at each iteration.