{"id":35989,"date":"2019-10-31T22:08:59","date_gmt":"2019-10-31T19:08:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/skanirovanie-dokumentov-po-seti\/"},"modified":"2019-10-31T22:08:59","modified_gmt":"2019-10-31T19:08:59","slug":"skanirovanie-dokumentov-po-seti","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/skanirovanie-dokumentov-po-seti","title":{"rendered":"Dokumentide skaneerimine v\u00f5rgus","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Dokumentide v\u00f5rgu kaudu skaneerimine tundub \u00fchelt poolt olemas, kuid teiselt poolt ei ole see muutunud \u00fcldtunnustatud praktikaks, erinevalt v\u00f5rguprintimisest. Administraatorid peavad endiselt installima draivereid ning kaugskaneerimise seadistus on iga skanneri mudeli jaoks individuaalne. Millised tehnoloogiad on praegu olemas ja kas sellel stsenaariumil on tulevikku?
\n<\/a><\/noindex><\/p>\n

Paigaldatav draiver v\u00f5i otsene juurdep\u00e4\u00e4s<\/h2>\n

\nPraegu on levinud neli t\u00fc\u00fcpi draivereid: TWAIN, ISIS, SANE ja WIA. Sisuliselt toimivad need draiverid liidese rollina rakenduse ja tootja madala taseme teegi vahel, mis on seotud kindla mudeliga. <\/p>\n

\"Dokumentide
\nLihtsustatud arhitektuur skanneriga \u00fchendamiseks<\/p>\n

Tavaliselt arvatakse, et skanner on \u00fchendatud otse arvutiga. Kuid keegi ei piira protokolli madala taseme teegi ja seadme vahel. See v\u00f5ib olla ka TCP\/IP. Nii t\u00f6\u00f6tab praegu enamik v\u00f5rgu MFP-sid: skanner on n\u00e4htav kui kohaliku, kuid \u00fchendus toimub v\u00f5rgu kaudu.<\/p>\n

Selle lahenduse eeliseks on see, et rakendusele ei ole oluline, kuidas \u00fchendus on tehtud, peamine on n\u00e4ha tuttavat TWAIN, ISIS v\u00f5i muud liidest. Erilist tuge ei ole vaja ellu viia. <\/p>\n

Kuid ka miinused on ilmsed. Lahendus on seotud lauaarvuti operatsioonis\u00fcsteemiga. Mobiilseadmed j\u00e4\u00e4vad kohe toe alt v\u00e4lja. Teine miinus on see, et draiverid v\u00f5ivad keerulistes infrastruktuurides, n\u00e4iteks terminserverites, kus on \u00f5hukesed kliendid, t\u00f6\u00f6tada ebastabiilselt. <\/p>\n

Lahendusena v\u00f5iks olla otsese \u00fchenduse tugi skanneriga HTTP\/RESTful protokolli kaudu. <\/p>\n

TWAIN Direct<\/h3>\n

\nTWAIN Direct<\/a><\/noindex> oli ette pandud TWAIN Working Group'i konsortsiumi poolt draiverivaba juurdep\u00e4\u00e4su variandina.<\/p>\n

\"Dokumentide
\nTWAIN Direct<\/p>\n

Peamine idee on see, et kogu loogika kantakse skanneri poole. Skanner pakub juurdep\u00e4\u00e4su REST API kaudu. Lisaks sisaldab spetsifikatsioon seadme avalikustamise (autodiscovery) kirjeldust. N\u00e4eb hea v\u00e4lja. Administraatori jaoks t\u00e4hendab see v\u00f5imalike draiveriprobleemide v\u00e4ltimist. Toetatakse k\u00f5iki seadmeid, peaasi, et oleks koosk\u00f5las rakendus. Arendajatele on samuti eelised, eelk\u00f5ige tuttav suhtluse liides. Skanner toimib veebiteenusena. <\/p>\n

Kui arvestada reaalseid kasutusstsenaariume, siis leidub ka miinuseid. Esimene on deadlock'i olukord. Turul pole seadmeid, mis toetaksid TWAIN Direct, ja arendajatel pole m\u00f5tet seda tehnoloogiat toetada ja tagasi p\u00f6\u00f6rduda. Teiseks, turvalisus \u2013 spetsifikatsioon ei sea n\u00f5udeid kasutajate haldamiseks ega v\u00e4rskenduste sagedusele, et sulgeda v\u00f5imalikke turvaauke. Samuti ei ole selge, kuidas administraatorid saavad ajakohastusi ja ligip\u00e4\u00e4su kontrollida. Arvutis on viiruset\u00f5rjetarkvara. Aga skanneri p\u00fcsivara v\u00f5ib seda sisaldada, aga ka mitte. veebiserveriks<\/a>, mida ei pruugi olla. V\u00f5i v\u00f5ib olla, aga mitte sellisel kujul, nagu ettev\u00f5tte turvapoliitika n\u00f5uab. Olge n\u00f5us, et omada pahavara, mis saadab k\u00f5ik skaneeritud dokumendid vasakule, ei ole v\u00e4ga hea. See t\u00e4hendab, et selle standardi rakendamisega kaasnevad \u00fclesanded, mis on lahendatud kolmandate osapoolte rakenduste seadistustega, langevad seadmete tootjate \u00f5lgadele.<\/p>\n

Kolmas miinus on v\u00f5imaliku funktsionaalsuse kadumine. Draiverid v\u00f5ivad sisaldada t\u00e4iendavat j\u00e4relkasutust. Baarikoodide tuvastamine, tausta eemaldamine. M\u00f5ned skannerid omavad nn imprinter'i \u2013 funktsiooni, mis v\u00f5imaldab skanneril dokumenti t\u00f6\u00f6deldud dokumendile printida. Seda ei ole TWAIN Direct'is. Spetsifikatsioon lubab API laiendamist, kuid see toob kaasa arvukate isiklike rakenduste ilmumise. <\/p>\n

Ja veel \u00fcks miinus skanneri t\u00f6\u00f6stsenaariumites. <\/p>\n

Skaneerimine rakendusest v\u00f5i skaneerimine seadme kaudu. <\/h2>\n

\nVaatame, kuidas toimub tavap\u00e4rane skaneerimine rakendusest. Asetan dokumendi. Siis avatakse rakendus ja skaneerin. Seej\u00e4rel v\u00f5tan dokumendi. Kolm sammu. Kujutage n\u00fc\u00fcd ette, et v\u00f5rgu skanner asub teises ruumis. Pean selle juurde minema v\u00e4hemalt kaks korda. See on v\u00e4hem mugav kui v\u00f5rgutr\u00fckk. <\/p>\n

\"Dokumentide
\nTeine asi on, kui skanner suudab ise dokumendi edastada. N\u00e4iteks e-posti kaudu. Asetan dokumendi. Siis skaneerin. Dokument lendab kohe sihts\u00fcsteemi. <\/p>\n

\"Dokumentide
\nSelles seisnebki peamine erinevus. Kui seade on \u00fchendatud v\u00f5rku, siis on mugavam skaneerida kohe sihtsalvestusse: kausta, e-posti v\u00f5i ECM s\u00fcsteemi. Selles skeemis ei ole kohta draiverile. <\/p>\n

Kui vaadata olukorda, siis kasutame v\u00f5rgu skaneerimist, muutes olemasolevaid tehnoloogiaid. Seda tehakse nii t\u00f6\u00f6lauarakenduste kaudu draiveri kaudu kui ka otse seadme pealt. Kuid arvutist kaugskaneerimine ei ole saanud nii massiliseks nagu v\u00f5rgu printimine, erinevate t\u00f6\u00f6stsenaariumide t\u00f5ttu. Skaneerimine otse soovitud salvestusse muutub \u00fcha n\u00f5utumaks.<\/p>\n

TWAIN Direct skannerite toetus draiverite asendajana on v\u00e4ga hea samm. Kuid standard on veidi hilinenud. Kasutajad soovivad skaneerida otse v\u00f5rgu seadmest, saates dokumendid sihtkohta. Olemasolevatele rakendustele pole vaja uut standardit toetada, kuna k\u00f5ik t\u00f6\u00f6tab suurep\u00e4raselt ka praegu, ning skannerite tootjatel pole mingit vajadust seda rakendada, kuna rakendusi pole. <\/p>\n

Ja kokkuv\u00f5tteks. \u00dcksikute ja kaheetapiliste lehtede lihtne skaneerimine asendatakse telefonide kaamerate poolt. J\u00e4rele j\u00e4\u00e4b t\u00f6\u00f6stuslik skaneerimine, kus olulised on kiirus, tugifunktsioonide toimet\u00f6\u00f6tluse toetamine, mida TWAIN Direct ei saa tagada, ja kus j\u00e4\u00e4b oluliseks tihe integreerimine tarkvaraga.
\n
Allikas: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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