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1、Chapter Ⅶ GraphandImageProcessingandAnimationDesignChapterⅦGraphandImageProcessingandAnimationDesignSectionⅠTextPhotoshopIntroductionPhotoshopisthepremieretoolforworkingwithdigitalimagesofanykind.Itcanbeusedtodoanythingyoucandoinatraditionaldarkroom,andmuchmor
2、e.Imagesmayoriginatefromadigitalcamera,fromscans,fromstockphotolibraries,orfromexistingWeb-readyartwork.Photoshopcanbeusedtoworkonlineartaswellasphotographicimagery.Photoshopisatremendouslypowerfulcollectionoftools,andofferstheusermanydifferentwaysofmanipulati
3、ngimages.Mostoperationscanbecarriedoutsuccessfullyusinganyofthreeorfourdifferenttools.Becauseofthisflexibility,Photoshopisascomplicatedasitisversatile.Usersarefacedwithmyriadmenus,tools,palettes,panelsandoptions.Forallitscomplexity,Photoshop’sbasicscanbemaster
4、edquitequickly.WhenyouopenadocumentinPhotoshop,youshouldseethemenubaralongthetopofthescreen,aToolOptionbarjustbelowthat,themainToolPalettetotheleftofyourimagedocument,andtheimageitself.Therewilllikelyalsobeanumberofotherpanelsloomingtowardtherightofthescreen.I
5、fwe’llassumeyou’vealreadyacquiredtherawimagesyouneedtomanipulateasdigitalfilesinacommonformatsuchas.PSD,.TIF,.JPG,.GIF,.PNG,.TGA,etc.Photoshop—Save/ExportLikeeverythinginPhotoshop,thereareseveralpossiblewaystohandlesaveandexportstep.Beforeexportinganimageforus
6、eontheWeb,makesureyourresolutionis72dpi,andthatthe133Chapter Ⅶ GraphandImageProcessingandAnimationDesignwidthandheightareappropriateforthewebprojectyou’reworkingon.Forexample,youprobablydon’twantyourimagetobe1000pixelswide.UndertheFilemenu,chooseSaveforWeb.Int
7、hepanelthatcomesup,makesurethe4-Uptabischosenatthetop.Theupper-leftpaneshowsthequalityofyouroriginalimage.TheotherthreepanesallowyoutoexperimentwithdifferentcompressionsettingsbeforechoosingtheonethatwillenduponyourWebpage.Selectonetoworkwithbysimplyclickingon
8、it.Then,underSettings,chooseJPEGMedium.MakesureOptimizedischecked.AdjusttheQualityslidertoahigherorlowercompression — acompressionratioofaround55%willgiveyouthebestfilesize-quality
