Conversion from time coordinates to depth coordinates after time-domain imaging is necessary and requires time-domain velocity analysis. Velocity analysis can be performed along with the migration process, by using the double path-integral formulation (Schleicher and Costa, 2009; Merzlikin and Fomel, 2015). Recent advances in time-domain seismic imaging bring other possibilities, including velocity-independent imaging using local slopes (Cooke et al., 2009; Fomel, 2007) and time-to-depth conversion in the presence of lateral-velocity variations (Cameron et al., 2008; Li and Fomel, 2015).