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pdf2imageisapythonlibrarywhichconvertsPDFtoasequenceofPILImageobjectsusingpdftoppmlibraryUsageConvertPDFtoimagesRemember, TesseractcannotconvertPDFs,sofirstwemustconvertthePDFtofile,thenwecanconverttotext.ConvertthePDFtofile,changeoutthefilenamesattheend ofthiscommandtoyourownConvertingImagesandFilesPDFTesseractdoesnotsupportreadingPDFfilesWhenthestatuschangeto“Done”clickthe “DownloadTEXT”buttonInordertoperformthiscommand,youhavetoincludeaminussignfollowedbyalowercaseletterLandthenthelanguagecode[-l deu],whichtellstheprogramthatthefileisinGerman,and[PDF]totelltheprogramthattheoutputshouldnotbetheautomatictxtfile,butaPDFAllPDFs createdinTesseractshouldbesearchableIftextisn'talreadyembeddedinthePDF,thenyou'llneedtouseOCRtoextractthetextJPEGrequireslibjpegIftext isn'talreadyembeddedinthePDF,thenyou'llneedtouseOCRtoextractthetextWecancheckthisusingXpdfwhichwilloutputdocumentuponperformingthis taskBuildingaPDF-To-TextApplicationwithTesseractOCR.Forthisapplication,aself-hostedversionofv2shallbeimplementedtoenableofflineusageand portability.Sowe'llneedtodothisintwosteps:ConvertthePDFintoimages;UseOCRtoextracttextfromthoseimages.IntheCLI,cdintothedirectorywith theimagesorPDFsyouwanttoconvertClickthe“ConverttoTEXT”buttontostarttheconversionBecauseTesseractisforrecognizingtextlayers,itisbestto checkifthereisalreadyatextlayerpresentAllyouneedistoscanortakeaphotoofthetextyouneed,selectthefile,anduploadittoourtextrecognition serviceConvertingPDFtoImageStepRetrievethefollowingfilesof*Clickthe“ChooseFiles”buttontoselectyourPDFfilesForinstance,someofthese multiplecomponentscanbeusedtogetherinasingleflowtofirstconvertPDFsintoimages,thenprocesstheseimagesandfinallyextracttextfromthemusing OCR9, Iftextisn'talreadyembeddedinthePDF,thenyou'llneedtouseOCRtoextractthetextInputformatstessdocIfyouneedtoOCRPDFfiles,you shouldeitherconvertthemtoanotherformatoruseOCRmyPDF.Note:TesseractdoessupportPDFasanoutputSplitPDFintoimagesUseXnviewtocropout PDFheadersandfootersUseTesseractOCRtoconvertimagestotxtCombineindividualtxtfilesintoonebigtxtfileRemovePDFlinebreaksImportinto SuperMemoTesseractisanexcellentopen-sourceengineforOCRButitcan'treadPDFsonitsownAlsoyoucantransformPDFfileintoimages,onoutput youwillgetThispluginhasmultiplecomponents:OCRrecipe,Textextractionrecipe,Imageconversionrecipe,Imageprocessingrecipeandanotebooktemplate IwroteasimilarguidecalledDigitizingLearningMaterialsforAnki/SuperMemoyearsagoThelibrariesthatIusedfordevelopingthissolutionwerepdf2image(for convertingPDFtoimages),OpenCV(forImagepre-processing)andfinallyPyTesseractforOCRalongwithPythonNowthatyou'veinstalledallthepackages youwillneed,wecanmanipulateandconvertthefilesTesseractisanexcellentopen-sourceengineforOCRButitcan'treadPDFsonitsTesseract-OCR: TesseractOpenSourceOCREngine:JPG,PNG,GIF,BMP,TIFF:TXT,PDF,HOCR,TSVlanguagesandscripts:ExtendedOCR:ExtendOCRenginetoOCR orOpticalCharacterRecognitionhasneverbeensoeasyIftheimagewiththetextwasclearenough,youwillreceiverecognizedandreadabletextTesseractis anexcellentopen-sourceengineforOCRButitcan'treadPDFsonitsownTesseractusestheLeptonicalibrarytoreadimagesinoneoftheseformats: PNGrequireslibpng,libzConvertPDFtoimages, CalltheTesseractengineontheimagewithimagepathandconvertimagetotext,writtenlinebylineinthe commandpromptbytypingthefollowing:$tesseractimagepathstdoutTowritetheIfafileformatisnotsupportedbyTesseract,youshoulduseathirdparty softwaretoconvertittoanotherformatthatissupportedbyTesseractSupportedinputformatsSowe'llneedtodothisintwosteps:ConvertthePDFinto images;UseOCRtoextracttextfromthoseimages.