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圖像的分析與ppt課件-文庫吧資料

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【正文】 utionbutimageimproveresolutionppi.unitdegree,scannerrecordeddeterminesResolutionBestChoose  How較高的分辨率可以提高圖像的質(zhì)量,但分辨率過大會使圖像文件過大,處理速度慢,因此在選擇掃描分辨率時,需要綜合考慮掃描圖像的類型和用途。high.lightreflectionandmainoftheconcentratedisfeatures.andofthefirstblind,thenotpicture,seewhencertainTowardssobluereddifferentimagethecolorisCorrection色偏主要是集中在圖像的主色調(diào)及反射高光上 。 色偏校正 色偏是指圖像的顏色和原有的色調(diào)不同,偏向紅色和藍色等。subtlecolorcircumstancestheaccordingbechannelsofTheof12themostcolorcastimagetheallbecauseoftencolorsallwillsingleonbecantheoncarriedcanimagechannelforiscolorprinciple而對單個通道進行調(diào)整,可以根據(jù)具體的情況來調(diào)整色彩和細微層次 。color.otherindirectlywillbuttosingleisColortoothercurvescanthesespacetherefers ColorAnd  Color 色彩平衡及校正 色彩平衡是指能夠在色彩空間進行的調(diào)整,這些調(diào)整可以通過曲線和階調(diào)等方法來完成。higherbetweendarktonethepressedtoneandwhitemainlyitofresultingtootheparttheloss.Overexposure:oftheshadowsandblackhighertransferpointbrightinislevel,finelackdarkisanparttheoverexposed.Underexposure:underexposedofaresultingsuchimpactitself,thecontrolandoriginalAsexposureofThe曝光不足:由于太暗而使圖像的主要部分缺乏細微處層次,它主要表現(xiàn)在白點與亮調(diào)自己密度較大,黑點與暗調(diào)之間層次壓縮丟失。characteristics.oforiginalandondimmedbrightenedIntermediatethecannaturally,canbrighttocurveCurve中間色調(diào)的變亮或變暗取決于原稿的曝光度和原稿的特點 。point.intonethemand Curve color Levels adjustment Execute the image adjustments Levels mand, popup dialog box, this dialog box can be adjusted by the contrast of the image, as shown in Figure 1051 FigureAdjust   Photoshop提供的色彩調(diào)節(jié)命令 色階調(diào)節(jié)imagemodeinshouldadjustment,toousuallyinsuchto模式 samplingtomanagementtheprintingcorrespondingusingscanningIfoutput.totothenhumorforsetdisplayalterchanged,equipmentifoutputputerwiththeusedtheimagethespeedmemory,percentageaimagesmodel   RGB   CMYK顏色模式 若掃描過程中采用了與后端印刷相應(yīng)的色彩管理系統(tǒng),掃描儀允許采樣 CMYK模式進行掃描,這樣的圖像在 Photoshop中通常不作過多的調(diào)整,并且應(yīng)該在 CMYK模式下進行圖像編輯。scanned.onlytimeatRGBCMYKforbecansomemanagementbackendwithusedorelated,ofblackproducedsamplinggamutdeviceprintmodebecauseIninformationthefull,canmorecanThegamutwideRGBduemodeRGBoutimage UsuallyColor  AboutareabalanceDarkenedbalanceHalftonebalancedistrict 1.balancebalance.thereproductionisvisualfromturn,printinginkandyellow,numberatobalanceoftheInleadscolorfromfourcoloris Graygrayorigins 從理論上講,灰平衡的概念就是用一定數(shù)量的黃色、洋紅及青色油墨依次進行印刷疊印,從視覺上得到灰色,就是再現(xiàn)了灰平衡。to.isgraytoinmanagementasreferredreproduction,andfoundationtone,realizationiswork,verybalancethemanuscriptthereproductiontheprocessthecopyquality,ensuretechnologythescanningBalance 灰平衡 圖像掃描是保證印刷質(zhì)量的關(guān)鍵技術(shù)之一,在掃描復(fù)制過程中如何正確再現(xiàn)原稿中的灰平衡,是很重要的工作,它是實現(xiàn)階調(diào)、層次和色彩再現(xiàn)的基礎(chǔ),通常所說的色彩管理系統(tǒng)也是以實現(xiàn)灰平衡為基點的 。19081909Lewis.( UnitedwhiteBlackColor彩色照片filmKodakreversalworksWuzhongworksHe Chinesecopy 原稿的復(fù)制特點 國畫何靖泉作品  Originalinnertointhenpixels,mostlighttheautomaticallybutton,thearedialogandtone/highparttenUse“色階 ”及 “曲線 ”對話框中都設(shè)置了 “自動 ”按鈕,可以自動定義最亮及最暗處的像素點,然后按比例重新分布內(nèi)部的像素點。point.mostoftheitpixeltheyreadings,andtheFigureshowndialogofthemove,canvasdowntool,Selecttothemarket.orblackmostisplacetheslowlythetriangletheLevelsthemap,theOK:thepoint通過 “曲線 ”確定:選擇吸管工具,在畫布上按住
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