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1、FoodBioprocessTechnol(2010)3:2–12DOI10.1007/s11947-008-0093-7REVIEWPAPERWaveletAnalysisofSignalsinAgricultureandFoodQualityInspectionChandraB.Singh&RuplalChoudhary&DigvirS.Jayas&JitendraPaliwalReceived:30March2008/Accepted:15May2008/Publishedonline:17June2008#SpringerScience+Business
2、Media,LLC2008AbstractFoodqualityandsafetyhavebecomethetopofinterestvaryaccordingtothedisciplineandobjectivesofprioritiesforagricultureandfoodprocessingindustrydueastudy.Inagriculturalandfoodproductshandlingandtotheincreasingconsumerdemandforhigh-qualityhealthyprocessingindustry,foodq
3、ualityandsafetyarethemostfood.Thefoodprocessingindustryiscurrentlyfocusingonimportantaspectstobeaddressed.Manyoftheadvancedusingfast,precise,andnondestructiveautomatedqualityagriculturalandfoodproductsqualityinspectiontechniquesinspectiontechniques.Near-infraredspectroscopy,imageuseu
4、ltrasoundsignals,dielectricsignals,nuclearmagneticprocessing,hyperspectralimaging,X-rays,andultrasonicresonancespectra,opticalspectraincludingultraviolet,techniqueshavebeenresearchedandshowntohavehighvisibleandnearinfrared(NIR)bands,anddigitalimagepotentialforautomatedinspection.Theb
5、iggestchallengeinsignals.Digitalimagesignalscanbetwodimensionaltheautomatedinspectionsystemsdealswithsignalpre-signalssuchasopticalvisibleimages,ultrasonicimages,X-processing,denoising,featureextraction,anditsre-synthesisrayimagesorthreedimensionalsignalssuchashyper-forclassification
6、purposes.Severalresearchstudieshavespectralimages,computedtomography(CT)images,andestablishedthatthetechniqueofwaveletanalysiscanverymagneticresonanceimages(MRI).Mostofthesesignalswellresolvetheseissuesofsignalprocessinginmanyneedtobeanalyzedtoextractusefulinformationincorpo-systemsu
7、sedforqualityinspectionofagriculturalandfoodratedwithinthem.Thesesignalscanbeeitherinanalogorproducts.Theobjectiveofthispaperistodiscussthetheorydigitalformat,butinrecentyearsdigitalsignalprocessingofwaveletanalysisandreviewitsapplicationinsignalhasbecomepopular.Withthewidespreadavai
8、labilityofpr
