简介:Thispaperinvestigatesthemathematicfeaturesofnon-linearmodelsanddiscussestheprocessingwayofnon-linearfactorswhichcontributestothenon-linearityofanonlinearmodel.Onthebasisoftheerrordefinition,thispaperputsforwardanewadjustmentcriterion,SGPE.Last,thispaperinvestigatesthesolutionofanon-linearregressionmodelinthenon-linearmodelspaceandmakesthecomparisonbetweentheestimatedvaluesinnon-linearmodelspaceandthoseinlinearmodelspace.
简介:Thedeep-seafloorimagesareacquiredundernon-uniformillumination,theeffectsofwhichbringupmanydifficultiesforimagesegmentation.Thepapercomparesthreemethodsofremovingnon-uniformilluminationeffects.Theeffectivenessandrobustnessareevaluatedonthreetestimageswithhigh-,moderate-andlow-densitygrains,respectively.Theresultsshowthatlocalfilteringalgorithmdoesnotremovethenon-uniformilluminationeffectscompletely.Theimagesubtractingalgorithmwilllosesomeofthedynamicrangeoftheoriginaldata.Theenhancedimagestretchingalgorithmisthemosteffectiveone.