In　order　to　obtain　a　clear　image　that　contains　all　relevant　objects　in　all　area,　this　paper　proposes　a　new　image　fusion　algorithm.　The　proposed　method　can　adaptively　determine　the　linking　strengths　of　PCNN　based　on　the　regional　image　moment　invariants.　Compared　with　the　traditional　methods,　the　results　of　experiments　show　that　the　new　algorithm　enhances　the　fusion　image　information,　effectively　retains　the　source　image　edges　and　detail　information.　The　effect　of　fusion　and　quantifying　indicators　are　fairly　good.