Kwelinye icala, ukuskena amaxwebhu kuthungelwano kubonakala kukho, kodwa kwelinye icala, akubanga yinto eqhelekileyo eyamkelweyo, ngokungafaniyo noshicilelo lwenethiwekhi. Abalawuli basafakela abaqhubi, kwaye useto lokuskena olukude lulodwa kwimodeli yeskena ngasinye. Zeziphi iiteknoloji ezikhoyo ngoku, kwaye ngaba imeko enjalo inekamva?
Umqhubi ofakelwayo okanye ukufikelela ngokuthe ngqo
Kukho ngoku ezine iintlobo eziqhelekileyo zabaqhubi: TWAIN, ISIS, SANE kunye ne-WIA. Ngokusisiseko, aba baqhubi basebenza njengojongano phakathi kwesicelo kunye nethala leencwadi elikwinqanaba elisezantsi elivela kumenzi onxibelelanisa nemodeli ethile.
Ulwakhiwo loqhagamshelo lweskena olulula
Ngokuqhelekileyo kucingelwa ukuba iskena siqhagamshelwe ngqo kwikhompyuter. Nangona kunjalo, akukho mntu uthintela iprotocol phakathi kwelayibrari ekumgangatho ophantsi kunye nesixhobo. Isenokuba yiTCP/IP. Le yindlela ezininzi ii-MFPs zothungelwano ezisebenza ngayo ngoku: iskena sibonakala njengendawo yendawo, kodwa uxhulumaniso luhamba ngenethiwekhi.
Inzuzo yesi sisombululo kukuba isicelo asikhathali ngokuthe ngqo ukuba uxhulumaniso lwenziwa njani, into ephambili kukubona i-TWAIN eqhelekileyo, i-ISIS okanye enye i-interface. Akukho mfuneko yokuphumeza inkxaso ekhethekileyo.
Kodwa izinto ezingeloncedo nazo ziyabonakala. Isisombululo sisekelwe kwi-desktop OS. Izixhobo eziphathwayo azisaxhaswa. I-disadvantage yesibini kukuba abaqhubi banokungazinzi kwiziseko eziyinkimbinkimbi, umzekelo, kwiiseva ze-terminal kunye nabaxhasi abancinci.
Indlela yokuphuma iya kuba kukuxhasa uqhagamshelo oluthe ngqo kwiskena nge-HTTP/RESTful protocol.
TWAIN Ngqo
yacetywa liQela eliSebenzayo le-TWAIN njengendlela yokufikelela ngaphandle komqhubi.
TWAIN Ngqo
Ingcamango ephambili kukuba yonke ingqiqo ikhutshelwe kwicala lesikena. Kwaye iskena sibonelela ngokufikelela nge-REST API. Ukongeza, iinkcukacha ziqulethe inkcazo yokupapashwa kwesixhobo (ukufunyanwa kwe-autodiscovery). Ibonakala intle. Kumlawuli, oku kususa iingxaki ezinokwenzeka ngabaqhubi. Inkxaso yazo zonke izixhobo, into ephambili kukuba kukho isicelo esihambelanayo. Kukwakho izinto eziluncedo kumphuhlisi, ngokuyintloko ujongano oluqhelekileyo lokusebenzisana. Iskena sisebenza njengenkonzo yewebhu.
Ukuba siqwalasela iimeko zokusetyenziswa ngokwenene, kuya kubakho nokungalunganga. Eyokuqala yimeko ye-deadlock. Akukho zixhobo kwiimarike kunye ne-TWAIN Direct kwaye akukho ngqiqo kubaphuhlisi ukuxhasa le teknoloji, kwaye ngokuphambene noko. Okwesibini lukhuseleko; ingcaciso ayinyanzelisi iimfuneko kulawulo lomsebenzisi okanye ukuphindaphindwa kohlaziyo lokuvala imingxunya enokwenzeka. Kananjalo akucaci ukuba abalawuli banokulawula njani uhlaziyo kunye nokufikelela. Ikhompyuter inesoftware ye-antivirus. Kodwa kwi-firmware yeskena, ngokucacileyo iya kuba neseva yewebhu, oku kusenokungabi njalo. Okanye yiba, kodwa hayi oko kufunwa ngumgaqo-nkqubo wokhuseleko wenkampani. Vuma, ukuba ne-malware eya kuthumela onke amaxwebhu askeniweyo ngasekhohlo ayilunganga kakhulu. Okokuthi, ngokuphunyezwa kwalo mgangatho, imisebenzi esonjululwe luseto lwezicelo zomntu wesithathu itshintshelwa kubenzi besixhobo.
I-disadvantage yesithathu yilahleko enokwenzeka yokusebenza. Abaqhubi banokuba ne-post-processing eyongezelelweyo. Ukuqatshelwa kwebhakhowudi, ukususwa ngasemva. Ezinye iiskena zinento ebizwa ngokuba yi. umshicileli - umsebenzi ovumela iskena ukuba siprinte kuxwebhu oluqhutywe. Oku akufumaneki kwi-TWAIN Direct. Inkcazo ivumela i-API ukuba yandiswe, kodwa oku kuya kukhokelela ekuphunyezweni kwezinto ezininzi.
Kwaye enye ngaphezulu thabatha kwiimeko zokusebenza kunye neskena.
Skena kwisicelo, okanye scan kwisixhobo
Makhe sijonge indlela iskena esiqhelekileyo esivela kwisicelo esisebenza ngayo. Ndibeka uxwebhu phantsi. Emva koko ndivula i-app kwaye ndiskena. Emva koko ndithatha uxwebhu. Amanyathelo amathathu. Ngoku khawufane ucinge ukuba iskena sothungelwano sikwelinye igumbi. Kufuneka wenze ubuncinane iindlela ezi-2 kuyo. Oku kulula kancinci kunoshicilelo lwenethiwekhi.
Ngomnye umcimbi xa iskena ngokwaso sinokuthumela uxwebhu. Umzekelo, ngeposi. Ndibeka uxwebhu phantsi. Emva koko ndiya scan. Uxwebhu lubhabhela ngokukhawuleza kwisixokelelwano ekujoliswe kuso.
Lo ngowona mahluko uphambili. Ukuba isixhobo siqhagamshelwe kwinethiwekhi, ngoko kulungele ngakumbi ukuskena ngokuthe ngqo kwindawo ekujoliswe kuyo: ifolda, i-imeyile okanye inkqubo ye-ECM. Akukho ndawo yomqhubi kule sekethe.
Ukusuka kwimbono yangaphandle, sisebenzisa ukuskena kwenethiwekhi ngaphandle kokutshintsha ubugcisa obukhoyo. Ngaphezu koko, zombini ukusuka kwizicelo zedesktop ngomqhubi, kwaye ngokuthe ngqo kwisixhobo. Kodwa ukuskena kude kwikhompyuter akukhange kuxhaphake njengoshicilelo lwenethiwekhi ngenxa yomahluko kwiimeko zokusebenza. Ukuskena ngokuthe ngqo kwindawo yokugcina oyifunayo kuya kuthandwa ngakumbi.
Inkxaso ye-TWAIN Direct scanners njengokutshintshwa kwabaqhubi linyathelo elihle kakhulu. Kodwa umgangatho usemva kancinci. Abasebenzisi bafuna ukuskena ngokuthe ngqo kwisixhobo sothungelwano, ukuthumela amaxwebhu kwindawo abasingise kuyo. Izicelo ezikhoyo azidingi ukuxhasa umgangatho omtsha, kuba yonke into isebenza kakuhle ngoku, kwaye abavelisi beskena abafuni ukuyiphumeza, kuba akukho zicelo.
Ukuququmbela. Indlela eqhelekileyo ibonisa ukuba ukuskena nje iphepha elinye okanye amabini kuya kutshintshwa ziikhamera ezikwiifowuni. Kuya kuhlala kusenziwa ukuskena kwamashishini, apho isantya sibalulekile, inkxaso yemisebenzi yasemva kokulungiswa kwe-TWAIN Direct ayinakukwazi ukubonelela, kwaye apho ukudibanisa okuqinileyo kunye nesoftware kuya kuhlala kubalulekile.
umthombo: www.habr.com