{"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\/cs\/blog\/administrirovanie\/skanirovanie-dokumentov-po-seti","title":{"rendered":"Skenov\u00e1n\u00ed dokument\u016f po s\u00edti.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Skenov\u00e1n\u00ed dokument\u016f p\u0159es s\u00ed\u0165 s jedn\u00e9 strany sice existuje, ale z druh\u00e9 strany se nestalo v\u0161eobecn\u011b uzn\u00e1vanou prax\u00ed, na rozd\u00edl od s\u00ed\u0165ov\u00e9ho tisku. Spr\u00e1vci st\u00e1le instaluj\u00ed ovlada\u010de a nastaven\u00ed vzd\u00e1len\u00e9ho skenov\u00e1n\u00ed je individu\u00e1ln\u00ed pro ka\u017ed\u00fd model skeneru. Jak\u00e9 technologie jsou v sou\u010dasnosti k dispozici a m\u00e1 tento sc\u00e9n\u00e1\u0159 v budoucnu v\u016fbec \u0161anci?
\n<\/a><\/noindex><\/p>\n

Instalovan\u00fd ovlada\u010d nebo p\u0159\u00edm\u00fd p\u0159\u00edstup<\/h2>\n

\nV sou\u010dasnosti existuj\u00ed \u010dty\u0159i b\u011b\u017en\u00e9 typy ovlada\u010d\u016f: TWAIN, ISIS, SANE a WIA. V podstat\u011b tyto ovlada\u010de slou\u017e\u00ed jako rozhran\u00ed mezi aplikac\u00ed a n\u00edzko\u00farov\u0148ovou knihovnou od v\u00fdrobce, kter\u00e1 se spoj\u00ed s konkr\u00e9tn\u00edm modelem. <\/p>\n

\"Skenov\u00e1n\u00ed
\nZjednodu\u0161en\u00e1 architektura p\u0159ipojen\u00ed ke skeneru<\/p>\n

Obvykle se p\u0159edpokl\u00e1d\u00e1, \u017ee skener je p\u0159ipojen p\u0159\u00edmo k po\u010d\u00edta\u010di. Nicm\u00e9n\u011b, nikdo neomezuje protokol mezi n\u00edzko\u00farov\u0148ovou knihovnou a za\u0159\u00edzen\u00edm. M\u016f\u017ee to b\u00fdt i TCP\/IP. Takto v sou\u010dasnosti funguje v\u011bt\u0161ina s\u00ed\u0165ov\u00fdch MFP: skener je viditeln\u00fd jako lok\u00e1ln\u00ed, ale p\u0159ipojen\u00ed prob\u00edh\u00e1 p\u0159es s\u00ed\u0165.<\/p>\n

V\u00fdhodou tohoto \u0159e\u0161en\u00ed je, \u017ee aplikaci nezaj\u00edm\u00e1, jak je p\u0159ipojen\u00ed realizov\u00e1no, hlavn\u00ed je m\u00edt k dispozici zn\u00e1m\u00e9 rozhran\u00ed TWAIN, ISIS nebo jin\u00e9. Nen\u00ed nutn\u00e9 implementovat speci\u00e1ln\u00ed podporu. <\/p>\n

Ov\u0161em nev\u00fdhody jsou z\u0159ejm\u00e9. \u0158e\u0161en\u00ed je z\u00e1visl\u00e9 na desktopov\u00e9m opera\u010dn\u00edm syst\u00e9mu. Mobiln\u00ed za\u0159\u00edzen\u00ed okam\u017eit\u011b vypad\u00e1vaj\u00ed z podpory. Druhou nev\u00fdhodou je, \u017ee ovlada\u010de mohou na slo\u017eit\u00fdch infrastruktur\u00e1ch, nap\u0159\u00edklad na termin\u00e1lov\u00fdch serverech s tenk\u00fdmi klienty, fungovat nestabiln\u011b. <\/p>\n

\u0158e\u0161en\u00edm m\u016f\u017ee b\u00fdt podpora p\u0159\u00edm\u00e9ho p\u0159ipojen\u00ed ke skeneru prost\u0159ednictv\u00edm protokolu HTTP\/RESTful. <\/p>\n

TWAIN Direct<\/h3>\n

\nTWAIN Direct<\/a><\/noindex> byl navr\u017een konsorciem TWAIN Working Group jako bezdr\u00e1tov\u00fd p\u0159\u00edstup bez ovlada\u010de.<\/p>\n

\"Skenov\u00e1n\u00ed
\nTWAIN Direct<\/p>\n

Hlavn\u00ed my\u0161lenka je, \u017ee ve\u0161ker\u00e1 logika se p\u0159esouv\u00e1 na stranu skeneru. Skener poskytuje p\u0159\u00edstup pomoc\u00ed REST API. Nav\u00edc specifikace obsahuje popis publikace za\u0159\u00edzen\u00ed (autodiscovery). Vypad\u00e1 to slibn\u011b. Pro spr\u00e1vce to znamen\u00e1 zbaven\u00ed se mo\u017en\u00fdch probl\u00e9m\u016f s ovlada\u010di. Podpora v\u0161ech za\u0159\u00edzen\u00ed, hlavn\u011b aby existovala kompatibiln\u00ed aplikace. Pro v\u00fdvoj\u00e1\u0159e jsou zde tak\u00e9 v\u00fdhody, p\u0159edev\u0161\u00edm zn\u00e1m\u00e9 rozhran\u00ed interakce. Skener vystupuje jako webov\u00e1 slu\u017eba. <\/p>\n

Pokud zohledn\u00edme skute\u010dn\u00e9 sc\u00e9n\u00e1\u0159e pou\u017eit\u00ed, objev\u00ed se tak\u00e9 nev\u00fdhody. Prvn\u00ed je situace deadlocku. Na trhu nejsou za\u0159\u00edzen\u00ed s TWAIN Direct a v\u00fdvoj\u00e1\u0159\u016fm ned\u00e1v\u00e1 smysl tuto technologii podporovat a naopak. Druhou nev\u00fdhodou je bezpe\u010dnost, specifikace nepo\u017eaduje \u0159\u00edzen\u00ed u\u017eivatel\u016f, ani frekvenci aktualizac\u00ed pro uzav\u0159en\u00ed potenci\u00e1ln\u00edch bezpe\u010dnostn\u00edch d\u011br. Tak\u00e9 nen\u00ed jasn\u00e9, jak mohou administr\u00e1to\u0159i \u0159\u00eddit aktualizace a p\u0159\u00edstup. Na po\u010d\u00edta\u010di je antivirus. A ve firmwaru skeneru, kde to bude z\u0159ejm\u00e9, m\u016f\u017ee b\u00fdt webov\u00fd server<\/a>, ale nemus\u00ed b\u00fdt. Nebo m\u016f\u017ee existovat, ale neodpov\u00eddat po\u017eadavk\u016fm bezpe\u010dnostn\u00ed politiky spole\u010dnosti. Souhlas\u00edte, m\u00edt malware, kter\u00fd pos\u00edl\u00e1 ve\u0161ker\u00e9 naskenovan\u00e9 dokumenty stranou, nen\u00ed p\u0159\u00edli\u0161 dobr\u00e9. To znamen\u00e1, \u017ee p\u0159i implementaci t\u00e9to normy se \u00fakoly, kter\u00e9 byly \u0159e\u0161eny nastaven\u00edm extern\u00edch aplikac\u00ed, p\u0159en\u00e1\u0161\u00ed na v\u00fdrobce za\u0159\u00edzen\u00ed.<\/p>\n

T\u0159et\u00ed nev\u00fdhoda je mo\u017en\u00e1 ztr\u00e1ta funkcionality. Ovlada\u010de mohou m\u00edt dodate\u010dn\u00e9 zpracov\u00e1n\u00ed. Rozpozn\u00e1v\u00e1n\u00ed \u010d\u00e1rov\u00fdch k\u00f3d\u016f, odstran\u011bn\u00ed pozad\u00ed. N\u011bkter\u00e9 skenery maj\u00ed tzv. imprinter \u2013 funkci, kter\u00e1 umo\u017e\u0148uje skeneru tisknout na zpracovan\u00fd dokument. To v TWAIN Direct nen\u00ed. Specifikace povoluje roz\u0161\u00ed\u0159en\u00ed API, ale to povede k mno\u017estv\u00ed vlastn\u00edch implementac\u00ed. <\/p>\n

A je\u0161t\u011b jedna nev\u00fdhoda ve sc\u00e9n\u00e1\u0159\u00edch pr\u00e1ce se skenerem. <\/p>\n

Skenov\u00e1n\u00ed z aplikace nebo skenov\u00e1n\u00ed od za\u0159\u00edzen\u00ed <\/h2>\n

\nPod\u00edvejme se, jak prob\u00edh\u00e1 b\u011b\u017en\u00e9 skenov\u00e1n\u00ed z aplikace. Vlo\u017e\u00edm dokument. Pot\u00e9 otev\u0159u aplikaci a skenuji. Pot\u00e9 dokument vyzvednu. T\u0159i kroky. Te\u010f si p\u0159edstavte, \u017ee je s\u00ed\u0165ov\u00fd skener v jin\u00e9 m\u00edstnosti. Je pot\u0159eba ud\u011blat alespo\u0148 2 p\u0159\u00edstupy k n\u011bmu. To je m\u00e9n\u011b pohodln\u00e9 ne\u017e s\u00ed\u0165ov\u00fd tisk. <\/p>\n

\"Skenov\u00e1n\u00ed
\nO n\u011bco jin\u00e9ho je, kdy\u017e skener um\u00ed s\u00e1m poslat dokument. Nap\u0159\u00edklad na email. Vlo\u017e\u00edm dokument. Pot\u00e9 skenuji. Dokument okam\u017eit\u011b putuje do c\u00edlov\u00e9ho syst\u00e9mu. <\/p>\n

\"Skenov\u00e1n\u00ed
\nV tom je hlavn\u00ed rozd\u00edl. Pokud je za\u0159\u00edzen\u00ed p\u0159ipojeno k s\u00edti, je pohodln\u011bj\u0161\u00ed skenovat p\u0159\u00edmo do c\u00edlov\u00e9ho \u00falo\u017ei\u0161t\u011b: slo\u017eky, emailu nebo ECM syst\u00e9mu. V tomto sch\u00e9matu nen\u00ed m\u00edsto pro ovlada\u010d. <\/p>\n

Pokud se na to pod\u00edv\u00e1me z pohledu, pou\u017e\u00edv\u00e1me s\u00ed\u0165ov\u00e9 skenov\u00e1n\u00ed, ani\u017e bychom m\u011bnili existuj\u00edc\u00ed technologie. A to jak z desktopov\u00fdch aplikac\u00ed p\u0159es ovlada\u010de, tak p\u0159\u00edmo z za\u0159\u00edzen\u00ed. Nicm\u00e9n\u011b vzd\u00e1len\u00e9 skenov\u00e1n\u00ed z po\u010d\u00edta\u010de se nestalo tak roz\u0161\u00ed\u0159en\u00fdm jako s\u00ed\u0165ov\u00fd tisk, kv\u016fli rozd\u00edl\u016fm ve sc\u00e9n\u00e1\u0159\u00edch pou\u017eit\u00ed. Skanov\u00e1n\u00ed p\u0159\u00edmo do po\u017eadovan\u00e9ho \u00falo\u017ei\u0161t\u011b se st\u00e1v\u00e1 st\u00e1le v\u00edce \u017e\u00e1dan\u00fdm.<\/p>\n

Podpora skener\u016f TWAIN Direct jako n\u00e1hrada za ovlada\u010de je velmi spr\u00e1vn\u00fd krok. Ale standard p\u0159i\u0161el trochu pozd\u011b. U\u017eivatel\u00e9 cht\u011bj\u00ed skenovat p\u0159\u00edmo z s\u00ed\u0165ov\u00e9ho za\u0159\u00edzen\u00ed a odes\u00edlat dokumenty na m\u00edsto ur\u010den\u00ed. U sou\u010dasn\u00fdch aplikac\u00ed nen\u00ed d\u016fvod zav\u00e1d\u011bt nov\u00fd standard, proto\u017ee u\u017e nyn\u00ed v\u0161e funguje skv\u011ble, a v\u00fdrobci skener\u016f jej nemaj\u00ed pot\u0159ebu implementovat, proto\u017ee neexistuj\u00ed \u017e\u00e1dn\u00e9 aplikace. <\/p>\n

A nakonec. Celkov\u00fd trend ukazuje, \u017ee jednoduch\u00e9 skenov\u00e1n\u00ed jednoho nebo dvou str\u00e1nek bude nahrazov\u00e1no kamerami na telefonech. Z\u016fstane pr\u016fmyslov\u00e9 skenov\u00e1n\u00ed, kde je d\u016fle\u017eit\u00e1 rychlost, podpora funkc\u00ed post-processing, kter\u00e9 TWAIN Direct nem\u016f\u017ee poskytnout, a kde z\u016fstane d\u016fle\u017eit\u00e1 t\u011bsn\u00e1 integrace s softwarem.
\n
Zdroj: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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