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1、DigitalImageProcessingSecondEditionProblemSolutionswStudentSetRafaelC.GonzalezRichardE.WoodsPrenticeHallUpperSaddleRiver,NJ07458www.prenhall.com/gonzalezwoodsorwww.imageprocessingbook.comiiRevisionhistory10987654321Copyright°c1992•2002byRafaelC.GonzalezandRichardE.Woods1PrefaceThisabbreviatedmanual
2、containsdetailedsolutionstoallproblemsmarkedwithastarinDigitalImageProcessing,2ndEdition.Thesesolutionscanalsobedownloadedfromthebookwebsite(www.imageprocessingbook.com).2Solutions(Students)Problem2.1Thediameter,x,oftheretinalimagecorrespondingtothedotisobtainedfromsimilartriangles,asshowninFig.P2.
3、1.Thatis,(d=2)(x=2)=0:20:014whichgivesx=0:07d.FromthediscussioninSection2.1.1,andtakingsomelibertiesofinterpretation,wecanthinkofthefoveaasasquaresensorarrayhavingontheorderof337,000elements,whichtranslatesintoanarrayofsize580£580elements.Assumingequalspacingbetweenelements,thisgives580elementsand5
4、79spacesonaline1.5mmlong.Thesizeofeachelementandeachspaceisthens=[(1:5mm)=1;159]=1:3£10¡6m.Ifthesize(onthefovea)oftheimageddotislessthanthesizeofasingleresolutionelement,weassumethatthedotwillbeinvisibletotheeye.Inotherwords,theeyewillnotdetectadotifitsdiameter,d,issuchthat0:07(d)<1:3£10¡6m,ord<18:
5、6£10¡6m.FigureP2.14Chapter2Solutions(Students)Problem2.3¸=c=v=2:998£108(m/s)=60(1/s)=4:99£106m=5000Km.Problem2.6Onepossiblesolutionistoequipamonochromecamerawithamechanicaldevicethatsequentiallyplacesared,agreen,andabluepass®lterinfrontofthelens.Thestrongestcameraresponsedeterminesthecolor.Ifallthr
6、eeresponsesareapproximatelyequal,theobjectiswhite.Afastersystemwouldutilizethreedifferentcameras,eachequippedwithanindividual®lter.Theanalysiswouldbethenbasedonpollingtheresponseofeachcamera.Thissystemwouldbealittlemoreexpensive,butitwouldbefasterandmorereliable.Notethatbothsolutionsassumethatthe®e
7、ldofviewofthecamera(s)issuchthatitiscompletely®lledbyauniformcolor[i.e.,thecamera(s)is(are)focusedonapartofthevehiclewhereonlyitscolorisseen.Otherwisefurtheranalysiswouldberequiredtoisolatetheregionofunifor
