Inthispaper,weshowanewmethodtoreconstructandupdatethebackground.Thisapproachisbasedondouble-background.Weusethestatisticalinformationofthepixelintensitytoconstructabackgroundthatrepresentsthestatusduringalongtime,andconstructanotherbackgroundwithfeedbackinformationinmotiondetectiont