Lossy compression siv thaum hloov mus rau hom DjVu. Txoj kev no yog siv los khaws cov ntaub ntawv scanned, uas muaj ntau cov qauv, cim thiab cov duab. Tag nrho cov phiajcim no thiab cov duab kos yog qhov nyuaj heev kom paub txog, thiab tsuas yog tus txheej txheem ntawm qhov kev nyem no yooj yim rau cov khoom siv no.
Dab tsi yog DjVu Lossy Compression
Lossy compression method yuav suav nrog daim ntawv qub ntawm qhov uas cov ntaub ntawv qub tsis txawv ntawm cov uas yuav tau txais tom qab tsis dhau daim ntawv. Cov kev hloov pauv no tsis tseem ceeb thiab nrog kev siv txuas ntxiv ntawm cov ntawv siv compressed siv cov thev naus laus zis no yuav tsis cuam tshuam rau qhov kawg tshwm sim.
DjVu hom yog yooj yim heev rau compressing tsis tsuas yog cim thiab duab. Nws tseem yog feem ntau siv thaum luam tej ntawv qub thiab phau ntawv. Ntawm no, tsis tsuas yog cov ntsiab lus ntawm daim ntawv qub yog qhov tseem ceeb, tab sis kuj xim ntawm cov ntawv, cov qauv ntawm daim ntawv, kab ntawm los ntawm daim ntawv khoov lossis los ntawm cov ntiv tes, thiab cov zoo li. Ntawd yog, thaum ua haujlwm nrog cov khoom siv zoo li no, txhua qhov kev tsim qauv yog qhov tseem ceeb.
Daim ntawv zaws cov ntaub ntawv no nrov heev thiab feem ntau siv thaum ua haujlwm nrog cov ntawv. Ua tsaug rau cov thev naus laus zis no, ntau lub tsev qiv ntawv ntawm cov ntawv tshawb fawb tau tsim muaj. Txhawm rau zwm cov ntaub ntawv rau DjVu hom ntawv, cov thev naus laus zis tshwj xeeb tau tsim uas tso cai rau koj faib cov duab qub rau peb txheej, uas yog hu ua - foreground, tom qab thiab daim npog ntsej muag dub thiab dawb. Daim npog dub thiab dawb muaj cov duab ntawm cov ntawv nws tus kheej thiab txhua yam nws paub meej. Tag nrho cov duab kos thiab cov duab kos tau txais kev cawm nyob rau tom qab, ntxiv rau qhov kev ntxhib los mos ntawm cov nplooj ntawv, kev daws teeb meem uas tau muab txo kom txuag tau qhov chaw. Cov ntaub ntawv hais txog cov xim muaj nyob hauv daim npog ntsej muag tau txuag rau tom hauv ntej. Cov txheej no shrinks txawm ntau. Tom qab ntawd txhua qhov ntawm txheej tau nrawm siv cov teeb meem tshwj xeeb.
Yuav ua li cas hloov mus rau DjVu hom?
Raws li txoj cai, cov ntaub ntawv luam tawm tau hloov dua siab tshiab rau hauv DjVu hom. Feem ntau cov no yog hom PDF. Txhawm rau hloov cov ntaub ntawv los ntawm PDF rau DjVu hom ntawv, koj xav tau tshwj xeeb PDF rau DJVU Converter software. Nws yuav tsum rub tawm rau koj lub khoos phis tawm, feem ntau cov kev pab cuam yog rub tawm ua ib qho chaw khaws tseg.
Tom qab rub tawm cov ntawv, khaws nws thiab nyem rau ntawm cov ntaub ntawv teeb tsa txhawm rau nruab qhov program hauv koj lub computer. Thaum pib txoj haujlwm, koj yuav tsum qhia meej nyob rau ntawm Input File kab daim ntawv PDF thawj uas koj npaj yuav hloov ua lwm yam. Hauv qab no, hauv Output File kab ntawv, qhia cov ntawv tais ceev tseg uas daim ntawv hloov dua siab tshiab yuav raug cawm twb tau ua hom DjVu. Tom qab cov yeeb yam no, nyem khawm "OK" thiab txheej txheem hloov dua siab tshiab yuav pib. Nws raug nquahu kom qhib cov ntawv hauv DjVu hom ntawv siv Lizardtech Daim Ntawv Qhia Txog Cov Cuab Yeej, uas tuaj yeem tsis tsuas qhib cov ntaub ntawv ntawm hom ntawv no, tab sis kuj tsim lawv. Ntxiv rau cov haujlwm yooj yim no, nws muaj ntau tus lej zoo uas pab koj ua haujlwm nrog cov ntaub ntawv DjVu.
Ntxiv nrog rau kev ua haujlwm nrog cov phau ntawv qub thiab cov ntawv nrog cov cim nyuaj, cov hom ntawv no yog siv los ntawm cov neeg siv zoo ib yam los khaws cov ntaub ntawv ntau ntawm cov khoos phis tawj, txij li thaum sau, cov ntawv loj tau raug txo mus rau ntau megabytes.
