{"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\/ro\/blog\/administrirovanie\/skanirovanie-dokumentov-po-seti","title":{"rendered":"Scanarea documentelor \u00een re\u021bea","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Scanarea documentelor \u00een re\u021bea exist\u0103 pe o parte, dar nu a devenit o practic\u0103 obi\u0219nuit\u0103, spre deosebire de imprimarea \u00een re\u021bea. Administratorii instaleaz\u0103 \u00een continuare drivere, iar configurarea scan\u0103rii de la distan\u021b\u0103 este individual\u0103 pentru fiecare model de scanner. Ce tehnologii exist\u0103 \u00een prezent \u0219i exist\u0103 viitor pentru acest scenariu?
\n<\/a><\/noindex><\/p>\n

Driver instalat sau acces direct<\/h2>\n

\n\u00cen prezent, sunt r\u0103sp\u00e2ndite patru tipuri de drivere: TWAIN, ISIS, SANE \u0219i WIA. Aceste drivere servesc, de fapt, ca interfa\u021b\u0103 \u00eentre aplica\u021bie \u0219i biblioteca de nivel inferior a produc\u0103torului, care se leag\u0103 de un anumit model. <\/p>\n

\"Scanarea
\nArhitectura simplificat\u0103 a conexiunii cu scannerul<\/p>\n

De obicei, se presupune c\u0103 scannerul este conectat direct la computer. Cu toate acestea, nimeni nu limiteaz\u0103 protocolul dintre biblioteca de nivel inferior \u0219i aparat. Acesta poate fi \u0219i TCP\/IP. Astfel, majoritatea multifunc\u021bionalelor de re\u021bea func\u021bioneaz\u0103 \u00een prezent: scannerul este vizibil ca local, dar conexiunea se face prin re\u021bea.<\/p>\n

Avantajul acestei solu\u021bii este c\u0103 aplica\u021bia nu are importan\u021b\u0103 cum este realizat\u0103 conexiunea, important este s\u0103 aib\u0103 acces prin familiarul TWAIN, ISIS sau alt\u0103 interfa\u021b\u0103. Nu este nevoie s\u0103 se implementeze o suport special. <\/p>\n

Dar \u0219i dezavantajele sunt evidente. Solu\u021bia este legat\u0103 de OS desktop. Dispozitivele mobile sunt imediat excluse din suport. Al doilea dezavantaj, driverele pot func\u021biona instabil \u00een infrastructuri complexe, spre exemplu, pe servere terminale cu clien\u021bi sub\u021biri. <\/p>\n

O solu\u021bie ar fi suportul pentru conexiunea direct\u0103 la scanner prin protocolul HTTP\/RESTful. <\/p>\n

TWAIN Direct<\/h3>\n

\nTWAIN Direct<\/a><\/noindex> a fost propus de consor\u021biul TWAIN Working Group ca o op\u021biune pentru accesul f\u0103r\u0103 driver.<\/p>\n

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

Ideea principal\u0103 este c\u0103 toat\u0103 logica este mutat\u0103 pe partea scannerului. Scannerul ofer\u0103 acces prin REST API. \u00cen plus, specifica\u021bia con\u021bine descrierea public\u0103rii dispozitivului (autodiscovery). Arat\u0103 bine. Pentru administrator, aceasta \u00eenseamn\u0103 eliminarea poten\u021bialelor probleme cu driverele. Suport pentru toate dispozitivele, important este s\u0103 fie o aplica\u021bie compatibil\u0103. Exist\u0103 \u0219i avantaje pentru dezvoltator, \u00een primul r\u00e2nd, interfa\u021ba de interac\u021biune cunoscut\u0103. Scannerul func\u021bioneaz\u0103 ca un serviciu web. <\/p>\n

Dac\u0103 analiz\u0103m scenariile reale de utilizare, se pot g\u0103si \u0219i dezavantaje. Primul este situa\u021bia de deadlock. Pe pia\u021b\u0103 nu exist\u0103 dispozitive cu TWAIN Direct, iar dezvoltatorilor nu le este de folos s\u0103 sus\u021bin\u0103 aceast\u0103 tehnologie, \u0219i invers. Al doilea dezavantaj este securitatea, specifica\u021bia nu impune cerin\u021be privind gestionarea utilizatorilor sau frecven\u021ba actualiz\u0103rilor pentru a \u00eenchide posibilele bre\u0219e. De asemenea, nu este clar cum pot administra\u021bii s\u0103 controleze actualiz\u0103rile \u0219i accesul. Pe computer exist\u0103 software antivirus. \u00cens\u0103 \u00een firmware-ul scanner-ului, este evident c\u0103 va avea server web<\/a>, acesta poate s\u0103 nu existe. Sau poate exista, dar nu ceea ce cere politica de securitate a companiei. S\u0103 ai un malware care va trimite la st\u00e2nga toate documentele scanate nu este foarte bine. A\u0219adar, odat\u0103 cu implementarea acestui standard, sarcinile care erau rezolvate prin set\u0103rile aplica\u021biilor ter\u021be sunt transferate pe umerii produc\u0103torilor de dispozitive.<\/p>\n

Al treilea dezavantaj este pierderea posibil\u0103 a func\u021bionalit\u0103\u021bii. Driverele pot avea o procesare suplimentar\u0103. Recunoa\u0219tere de coduri de bare, eliminarea fundalului. Unele scanere au a\u0219a-numitul imprinter \u2014 o func\u021bie care permite scanner-ului s\u0103 imprime pe documentul procesat. Acest lucru nu exist\u0103 \u00een TWAIN Direct. Specifica\u021bia permite extinderea API-ului, dar asta va duce la apari\u021bia multor implement\u0103ri proprii. <\/p>\n

\u00cenc\u0103 un dezavantaj \u00een scenariile de lucru cu scannerul. <\/p>\n

Scanarea din aplica\u021bie sau scanarea de pe dispozitiv <\/h2>\n

\nS\u0103 vedem cum se desf\u0103\u0219oar\u0103 o scanare obi\u0219nuit\u0103 din aplica\u021bie. Pun documentul. Apoi deschid aplica\u021bia \u0219i scanez. Apoi iau documentul. Trei pa\u0219i. Acum imagina\u021bi-v\u0103 c\u0103 scannerul de re\u021bea este \u00een alt\u0103 camer\u0103. Trebuie s\u0103 mergi de cel pu\u021bin 2 ori la el. Este mai pu\u021bin convenabil dec\u00e2t imprimarea pe re\u021bea. <\/p>\n

\"Scanarea
\nAltceva este c\u00e2nd scannerul \u0219tie s\u0103 trimit\u0103 documentul singur. De exemplu, pe e-mail. Pun documentul. Apoi scanez. Documentul zboar\u0103 imediat \u00een sistemul \u021bint\u0103. <\/p>\n

\"Scanarea
\nAceasta este diferen\u021ba principal\u0103. Dac\u0103 dispozitivul este conectat la re\u021bea, este mai convenabil s\u0103 scanezi direct \u00een locul de stocare \u021bint\u0103: folder, e-mail sau sistem ECM. \u00cen acest model nu exist\u0103 loc pentru driver. <\/p>\n

Dac\u0103 ne uit\u0103m din exterior, folosim scanarea de re\u021bea f\u0103r\u0103 a schimba tehnologiile existente. Fie c\u0103 este vorba despre aplica\u021bii desktop printr-un driver, fie direct de pe dispozitiv. Totu\u0219i, scanarea de la distan\u021b\u0103 de pe computer nu a devenit la fel de frecvent\u0103 ca imprimarea de re\u021bea, din cauza diferen\u021belor \u00een scenariile de utilizare. Scanarea direct \u00een spa\u021biul de stocare dorit devine tot mai c\u0103utat\u0103.<\/p>\n

Suportul pentru scanere TWAIN Direct ca \u00eenlocuire a driverelor este un pas foarte corect. \u00cens\u0103 standardul a venit pu\u021bin cam t\u00e2rziu. Utilizatorii doresc s\u0103 scaneze direct de pe dispozitivul de re\u021bea, trimi\u021b\u00e2nd documentele la destina\u021bie. Aplica\u021biile existente nu trebuie s\u0103 suporte noul standard, deoarece \u0219i acum totul func\u021bioneaz\u0103 perfect, iar produc\u0103torii de scanere nu au nevoie s\u0103-l implementeze, deoarece nu exist\u0103 aplica\u021bii. <\/p>\n

\u0218i, \u00een concluzie. Tendin\u021ba general\u0103 arat\u0103 c\u0103 scanarea simpl\u0103 a una - dou\u0103 pagini va fi \u00eenlocuit\u0103 de camerele de pe telefoane. Vor r\u0103m\u00e2ne scan\u0103rile industriale, unde viteza \u0219i suportul pentru func\u021biile de post-procesare, pe care TWAIN Direct nu le poate asigura, sunt importante, \u0219i unde integrarea str\u00e2ns\u0103 cu software-ul va r\u0103m\u00e2ne esen\u021bial\u0103.
\n
Sursa: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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