It　is　a　hot　topic　to　combine　visual　perception　principles　in　video　encoding.　A　fast　algorithm　for　region　of　interest　(ROI)　detection　based　on　human　visual　system　(HVS)　and　coding　information　is　proposed　in　this　paper.　Low-level　coding　information　is　employed　as　the　characteristics　of　visual　perception　analysis　in　order　to　avoid　a　large　amount　of　computation　for　visual　perception　characteristics　analysis　processing.　Then,　video　ROI　detection　is　carried　out　in　temporal　domain　and　spatial　domain　respectively.　Last,　combine　the　two　domains　saliency　detection　results　to　mark　the　video　ROI　level.　The　simulation　results　validate　that　the　proposed　algorithm　by　means　of　fast　motion　vector　(MV)　noise　filtering　and　translational　MV　checking　procedure,　then　realize　fast　visual　perception　characteristics　analysis　and　ROI　detection　effectively.　©　2013　ACADEMY　PUBLISHER.