黑白影像的彩色化研究

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1、分类号卫堕窆!UDC密级编号中国科学院研究生院博士学位论文987869指导教师鱼匿谌塞熬援虫垦科堂院电王堂硒塞压申请学位级别煎±学科专业名称筐曼皇篮皇处堡论文提交日期2006生4旦11日论文答辩日期2006生5旦25日培养单位主国型堂院电王堂婴究逝学位授予单位史国型堂瞳班塞生医新的图像质量评价指标——亮色变化不一致比，并验证了该指标对于衡量图像彩色化质量的有效性；这对于缓解因为缺乏有效标准、从而难于客观地评价图像彩色化结果的现状具有积极意义。关键词：彩色化，颜色扩展，运动估计，颜色传递，图像质量评价Researcho

2、nColorizationofMonochromeImagesandVideosTengShenghua(SignalandInformationProcessing)DirectedbyProf．ZouMouyanAbstractColorizationisacomputer-assistedtechniqueofaddingcolorstomonochromeimages，moviesorTVprograms．Thetechniquehasbeenwidelyusedinmovie·making，medicali

3、nstruments，imageenhancementforspaceexploring,andmanyotherindustrialandscientificfields．Uptonow,however,thecolorizationtechniqueremainsallactiveandchallengingareaintherealmofimageprocessing．Accordingtoitsapplicationandprocessingmode，colorizationisdividedintotwoc

4、ategories，namelypseudocolorizationandfalsecolorization．Pseudocolorizationimpliesthattheoriginalimagemayhave．notacolorattributeandtheaimofcolorizationistoenhancetheimageforinspection．Incontrast，falsecolorizationmeanstheimageoriginallyhasacolorattributebutsuchana

5、ttributehasbeenlostintheimagingprocessandthetechniqueintendstoimitatetheactualscene．Thisdissertationmainlydiscussesfalsecolorizationofmonochromeimagesandvideos．Aftersummarizingandanalyzingalltheavailableexistingtechniquesoffalsecolorization，afewnewandapplicable

6、colorizationtechniquesaredevelopedinthispaper．Themaincontributionsjnthedissertationareasfollows：1．Theoreticallysummarizingofcurrentcolorizationmethods．Colorizationistreatedasanill—posedproblem．Colorizationmethodsaredividedintotwokindsaccordingtotheirregularizat

7、ionforms：theoneonthebasisofcolortransferandtheotheronebyusingcolorpropagation．Thecolorpropagationmethodisconsideredtobemorereasonable．Theunderlyingmechanismofthemethodisthelocalcoherenceofimagecolors．Thecontrollingmodesofcolorpropagationareclassifiedintotwoclas

8、ses：micro‘controllingandmacro-controlling．2．Twoimagecolorizationmethodsbasedoncolorpropagationprincipleareproposedandverified．(1)Levin’Scolorizationmethodisinvestigatedandco