I-PDF ye-OCR

I-Free Online PDF OCR

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Ukulayisha

Indlela yoku-OCR PDF

1 Layisha phezulu i-PDF documents exhunywe; i-300 DPI ehlanzekile ye-greyscale inikeza isibonisi okuningi okusebenzela.

2 Uthi yini ukuthi linguliphi lingu lokulindeleka - ukubiza lingulimi kwenza ukuthi licabanga nge-margin ebanzi.

3 Sebenzisa ukukwazisa okudlulele; amagama abhalwe emuva njengezinga elibonakalayo elihlala phezu kwesithombe sekhasi elisemthethweni.

4 Layisha phezulu ifayela elitholakele PDF — libukeka lifana, kodwa manje ungasesha futhi ukhethe umbhalo kulo.

I-PDF ye-OCR Imibuzo Evame Ukubuzwa

Indlela i OCR PDF iguqula ngayo isikhangiso sibe umbhalo?

Ngokucacile, ikhasi ngalinye libonisa, lihamba nge-Tesseract text-recognition pass ezilimi ezingaphezu kuka-100, futhi amagama aphawulwe abhalwe emuva njenge-text layer engabonakali ebekwe phezu kwesithombe sakuqala — ngakho ikhasi libukeka lishintshiwe kodwa litholakale futhi likhethwa. Ikhasi libukeka ngokugcwele njengoba libukeka — umbhalo owaziwayo uhlala engekho ngemuva kwesithombe, ngakho ukusesha nokukhethwa kusebenza ngaphandle kokushintsha ukubonakala.

Iyini ulwimi oluzokwazi ukuwaqonda?

Kungaphezu kuka-100, kufaka phakathi isiLatini, isiCyrillic, isiGreki, isiArabhu, isiHebhere, isiChinese, isiJapane, isiKorea kanye ne-Indian scripts. Ukutshela ukuthi iyiphi ulwimi olindeleke ukuthi ithuthukise ngokuqinile ukuthembeka ngaphezu kokushiya ukucabanga.

Ingabe ifomethi yomsuka ithinta ukuphawula?

I-PDF ilungisa ikhasi: amafonti, ama-vectors, izithombe ze-raster kanye nemibhalo exhunywe ngokucophelela ukuze wonke umfundi abone isitayela esifanayo. Indlela ikhasi eligcinwayo ngayo ikhetha ukuthi yini isixazululo kanye nombala wolwazi odinga ukusebenzela.

Ingabe kukhona okuthile okukhethekile ku PDF lapha?

Yebo — i-PDF iyi-graph yento, hhayi isithombe sekhasi, ngakho umbhalo uhlala ukhethwa futhi ama-vectors ahlala aqinile kungakhathaliseki ukuthi kwenzekani ku-raster content ngaphakathi kwayo. Kuthinta ukuthi yini okwaziyo angabona.

Ingabe ilungile?

Ku-300 DPI ukuhlola okuhlanzekile kwesihloko esiphrintiwe, okuphezulu ngokwanele ukuthi amaphutha avame ukutholakala futhi avame ukutholakala kumagama ajwayelekile. Ukunemba kuhla kakhulu ngesinqumo esiphansi, ukusakazeka, izithunzi kusuka kwikhamera yefoni, amafonti ajwayelekile nokushicilelwa ngesandla — ukushicilelwa ngesandla ngokukhethekile akuyona into enjalo.

Yini okufanele ngiyiskena ukuze ngithole imiphumela engcono kakhulu?

300 DPI kugreyscale yindawo emnandi. ngaphansi kuka-200 DPI, izimpawu ziqala ukulahleka; ngaphezu kuka-400 DPI, awutholanga lutho futhi ukhokhe ngesayizi yefayela nesikhathi sokusebenza.

Yini engikwazi ukuyifaka ku OCR PDF?

Noma yiziphi i-PDF ezijwayelekile, kufaka phakathi ezikhiqizwa yi-scanner, yi-word processor noma yi-print driver. Amafayela anegama lokungenisa elisemthethweni elivimbela kuphela ukuhlela aphathwa; amafayela adinga igama lomsebenzisi lokungenisa elisemthethweni ukuvulwa aphathwanga, futhi asizama ukuphula ukufihla.

Ingabe kunesilinganiselo sobukhulu behele ku OCR PDF?

Yebo: ama-akhawunti amahhala aphatha amadokhumende kuze kube yi 5 MB ngayinye, okubandakanya izixhumanisi eziningi namakontraki kodwa hhayi amadokhumende adlulile axhunywe ku-600 DPI; i-Ghostscript ne-qpdf zenza umsebenzi. I-PDF exhunywe yinto ejwayelekile edlula leyo, futhi ukucindezela idokhumende kuqala kulungile ukubuyisela ngezansi.

Ingabe OCR PDF izonciphisa ukhwalithi ye PDF documents yami?

Umbhalo nemisebenzi yezandla ye-vector yizinto hhayi ama-pixels, ngakho zihlala ziqinile nganoma yisiphi isibonisi noma yini ekwenzekayo. Izithombe ze-raster ezifakwe kuphela ezingakwazi ukuncipha, futhi uma umsebenzi okhethiwe uphinde uphinde uzame.

Ingabe ngizosebenzisa OCR PDF ku PDF documents amaningi ngasikhathi sinye?

Yebo — thumela iset futhi baqhubekela phambili ngokufanayo ngaphansi kweset eyodwa yezinhlelo, okuwukuphela kwento eyenza ukuphuma kwedokhumende lapha ngaphezu kokuchofoza ku-desktop reader.

Ingabe amabhukwana, amakhonkco namafomu ahlala?

Izinhlamvu, izixhumanisi zangaphakathi kanye neziphawulo zigcinwa lapho umsebenzi uvumela khona. Izinhlamvu zedijithali ziyisinqumo: noma yikuphi ushintsho kwifayela kudinga ukuvimbela isiphawulo, ngoba lokho kulungile ukuthi yini isiphawulo.

Ingabe OCR PDF ibiza noma yini?

No. OCR PDF ikhululekile ngaphandle kwe-akhawunti, futhi akukho okuthunyelwe kumakhasi. Amadokhumende alayishwe phezulu asuswa kubasebenzi ngemuva komsebenzi oqediwe.