Abstract—Whileimagealignmenthasbeenstudiedindifferentareasofcomputervisionfordecades,aligningimagesdepictingdifferentscenesremainsachallengingproblem.Analogoustoopticalflowwhereanimageisalignedtoitstemporallyadjacentframe,weproposeSIFTflow,amethodtoalignanimagetoitsnearestneighborsi