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1、DigitalImageProcessingSecondEditionProblemSolutionswStudentSetRafaelC.GonzalezRichardE.WoodsPrenticeHallUpperSaddleRiver,NJ07458www.prenhall.com/gonzalezwoodsorwww.imageprocessingbook.comiiRevisionhistory10987654321Copyright°c1992•2002byRafaelC.GonzalezandRicha
2、rdE.Woods1PrefaceThisabbreviatedmanualcontainsdetailedsolutionstoallproblemsmarkedwithastarinDigitalImageProcessing,2ndEdition.Thesesolutionscanalsobedownloadedfromthebookwebsite(www.imageprocessingbook.com).2Solutions(Students)Problem2.1Thediameter,x,ofthereti
3、nalimagecorrespondingtothedotisobtainedfromsimilartriangles,asshowninFig.P2.1.Thatis,(d=2)(x=2)=0:20:014whichgivesx=0:07d.FromthediscussioninSection2.1.1,andtakingsomelibertiesofinterpretation,wecanthinkofthefoveaasasquaresensorarrayhavingontheorderof337,000ele
4、ments,whichtranslatesintoanarrayofsize580£580elements.Assumingequalspacingbetweenelements,thisgives580elementsand579spacesonaline1.5mmlong.Thesizeofeachelementandeachspaceisthens=[(1:5mm)=1;159]=1:3£10¡6m.Ifthesize(onthefovea)oftheimageddotislessthanthesizeofas
5、ingleresolutionelement,weassumethatthedotwillbeinvisibletotheeye.Inotherwords,theeyewillnotdetectadotifitsdiameter,d,issuchthat0:07(d)<1:3£10¡6m,ord<18:6£10¡6m.FigureP2.14Chapter2Solutions(Students)Problem2.3¸=c=v=2:998£108(m/s)=60(1/s)=4:99£106m=5000Km.Problem
6、2.6Onepossiblesolutionistoequipamonochromecamerawithamechanicaldevicethatsequentiallyplacesared,agreen,andabluepass®lterinfrontofthelens.Thestrongestcameraresponsedeterminesthecolor.Ifallthreeresponsesareapproximatelyequal,theobjectiswhite.Afastersystemwoulduti
7、lizethreedifferentcameras,eachequippedwithanindividual®lter.Theanalysiswouldbethenbasedonpollingtheresponseofeachcamera.Thissystemwouldbealittlemoreexpensive,butitwouldbefasterandmorereliable.Notethatbothsolutionsassumethatthe®eldofviewofthecamera(s)issuchthati
8、tiscompletely®lledbyauniformcolor[i.e.,thecamera(s)is(are)focusedonapartofthevehiclewhereonlyitscolorisseen.Otherwisefurtheranalysiswouldberequiredtoisolatetheregionofunifor
