I izici eyinhloko isithwebuli nezinhlobo zabo

Yini okumelwe uyenze uma kudingeka ukuze uthumele isithombe nge e-mail zisephepheni? Mhlawumbe wonke umuntu uyazi ezifana isithwebuli idivayisi. Akukona nje ukusiza abantu ugcine izithombe ezindala, okwenza kube ngisho nomkhulu bethu, lahunyushelwa format zikagesi njengoba kwenza enye izincwadi ezibalulekile ngaphandle kokuba ikhodi yabo umthombo ku-PC.

Ngokuvamile, i - yinto enhle, futhi manje amahhovisi eziningi nje Irreplaceable. Ukuze sithole kahle oda iyiphi imodeli okudingayo, kufanele uhlole ukuthi yini izici eyinhloko isithwebuli.

Kuyini lokhu?

Kungcono ukuba ubheke imigomo yesayensi futhi ukuchaza ngolimi olulula, onjani idivayisi. Isithwebuli obhekene kokwenza inqubo yokufunda, okuyinto siqondiswe konemimoya flat ukuqoshwa (isib iphepha). Ekugcineni, umsebenzisi ithola idokhumenti sedijithali ulithumele bekude noma isitoreji in format electronic. Imiphumela Iskena ngendlela digital isithombe isithombe into ngenxa ADC zangaphandle. Ngemva kwalokho, isithombe ezithunyelwa kwikhompyutha nge ohlelweni I / O.

Imizamo yokuqala

Bambalwa abantu bazi, kodwa izici eziyisisekelo isithwebuli kwakwaziwa abacwaningi kusukela 1857. Khona-ke okunye amadivayisi yesimanje wenza Abbot Florence Dzhovanni Kazelli. kudivayisi lakhe lasebenza isihlobo bakudala kakhulu ubuchwepheshe bamuva. Khona-ke, ukuze uthumele isithombe ibanga, kwakudingekile ukuba wasibeka phezu umgqomo usebenzisa inki conductive, bese sicabangela isithombe ngenaliti. idivayisi ezinjalo ngokuthi pantelegraf.

Phakathi eminyakeni engamashumi ayisihlanu physics German olwenziwa experiment zabo ngalo lobunikazi by telefax. Arthur Korn basungula indlela ngenxa ukuskena Photoelectric. Umgomo we kwakungelula: isithombe isananyathiselwe kuwo wonke ama-drum efanayo, kodwa okusobala. Isibani zase zihleliwe ukuze ukugeleza ukukhanya Ungahambisa. Wedlula isithombe sokuqala bese ithunyelwa photodetector selenium, bese bakwazi ukungena ngokusebenzisa iphrizimu kanye ne-lens.

I Semiconductor omatasatasa, le photodetector ngokushesha ngcono. Naphezu kweqiniso lokuthi kamuva yasungulwa indlela ithebhulethi, isimiso azizange zishintshe.

izici

Ngaphambi esibhekana ngayo izinhlobo, udinga ukuba banake ezibekiweko of the isithwebuli. Kubo kukhona spectrum, futhi akukho ngezigaba ejwayelekile. ipharamitha ngalinye incike ngenhloso idivayisi. Noma kunjalo, zikhona izici esiyisisekelo, kufanele kukhethwe futhi Enani. Phakathi kwabo, ijubane, umbala ukujula, isinqumo izithombe okuholela, njll

Nobuhle wakhiwa imininingwane

Scanner Imininingwane zihlukene, kodwa isinqumo ingenye nemingcele main. Ngamagama alula: impahla unesibopho ubukhulu emincane komfanekiso kuzodluliselwa ngesikhathi scan. Ukulungiswa olushiwo dpi. Lokhu value kubonisa isibalo Amaphikseli ebonakalayo ngamunye intshi izithombe. Ngokuvamile, umenzi icacisa ukusebenza zonke izinqumo ezintathu:

• ngemishini;
• optical;
• yengetiwe.

Okokuqala udinga ukucacisa indawo ukuthutha nge be-CCD yomugqa ngesikhathi ukunyakaza yesithombe. Iqiniso ukuthi isinqumo awayindwayo kabili nomkhiqizi optical isebenzisa maqondana nomsebenzisi okungagunyaziwe. I-TX uveza bona ukubaluleka optical kuyinto 300h600 dpi. Kodwa uma idivayisi kungekho yengetiwe, uzogcwala ubuncane 300 dpi.

isinqumo Interpolated unesibopho usayizi okungase etholwe scaling isithombe kuze kube izikhathi 16. Ngomqondo onabile, lena okungenani ipharamitha ezibalulekile, futhi cishe ongaqhubeki noma iyiphi idatha ezengeziwe. Kodwa futhi umkhiqizi yayo ingasetshenziswa ngokumelene umthengi, ekhomba ibhokisi 4800 dpi. Lesi sibalo kungagcizelela nomuntu ngenalwazi. Kodwa ubani akusho ukwazi izimfanelo isithwebuli, kodwa kwakuzoba ukuthenga idivayisi kufanele bacabangele ukuthi langempela ukubaluleka optical kungenzeka dpi 300 kuphela.

I-agumenti main - kungcono isinqumo optical. Ukuze uchaze ke, kudingeka ukubala lokuhlushwa izakhi emgqeni ukukhanya-sensitive. Ukuze wenze lokhu, inani izingxenye kuso ehlukaniswa ububanzi. Lolu khetho, njengoba kushiwo ngaphambili, esiphawuleka kunazo ekunqumeni izithombe nemininingwane. Ngakho-ke, kuyinto engavamile ukuthola ebhokisini ngedivayisi, njengoba bobabili nomkhiqizi kanye nomdayisi ukubufihla izibalo zangempela.

izibalo "Dry"

Njengoba kushiwo ngaphambili, akulula ukuba ukhethe idivayisi. Izici scanner kungase ukudida i umthengi ongenalwazi, ngakho ngaphambi kokuthenga ukuqonda kangcono ku uhlelo ngalunye. I kancane ezayo emva isixazululo, ukujula noma umthunzi. Lokhu kwebalingisi kubonisa isibalo ibhithi edingekayo ukugcina ulwazi umbala kwe-pixel ngayinye. isidingo kancane scanner omnyama nomhlophe kumemori. Sinenkosi omunye kancane. Monochrome elengeziwe - 8, nombala - 24 izingcezu. Izikena ngaphezulu ingxenye ezibizayo kungenzeka 36-bit.

Umbala ukujula kuyinto zangaphakathi nezangaphandle. Lezi zinkomba kucacise umenzi. Yangaphakathi libhekene kancane analog-to-digital transformer, kusiza ukucacisa inombolo imibala 'simbone' isithwebuli. Ukujula kwangaphandle - inombolo imibala kudivayisi uyakwazi ukudlulisela PC.

Uma udinga idivaysi ehhovisi noma ekhaya, ofanele futhi ezivamile kancane - 24 bit. Uma i liyadingeka abasembonini yokunyathelisa nezinhlangano ezifanayo, kungcono ukubheka iyunithi 48 izingcezu.

inhlanganiso optical

Kuleli isithwebuli izici abagcini lapho. Kukhona kwabantu esiphezulu optical. Uma ungenalo bangene imininingwane nezincazelo yesayensi, yikhono zedivayisi ukuskena izithombe amnyama: nozwela insimbi, idijithali kangcono ezindaweni ezimnyama yesithombe.

Njengoba sihambisana nale inketho kukhona optical kwabantu ezahlukene. Kungaba ibalwe ne logarithm ledesimali. Kuyinto isilinganiso nenani sigameko ukukhanya oku iskripthi ukuba lemali kubonakala. Ububanzi isilinganiso okwesikhathi-24-bit izwi obuphelele kufanele kube 1,8-2,3 D.

isivinini

Lokhu kulungiselelwa futhi ngokuvamile sikhohlwe ucacise owenza angasho lutho. Noma kunjalo, izinga ukuskena kuxhomeke ezicini eziningana. kuqala iyona isixazululo kanye Usayizi wasekuqaleni. Izinga kungase kubonise inani Amakhasi ngomzuzu, noma umane ngesikhathi lapho ishidi elilodwa icutshungulwe ngayinye. Kukhona yokukala ukuskena imigqa ngomzuzwana.

Usayizi endaweni ukuskenwa ingaphinda nhlobonhlobo. Isixazululo ezivamile - uyibhala A4. onobuhle batholakala Amahhovisi nasemakhaya. Kunoma iyiphi ibhizinisi angasebenzisa A3. Ukuze scanner ngesandla usayizi band 11 cm.

esibonakalayo

Hhayi ngaso sonke isikhathi izici isithwebuli zibaluleke ngokukhethekile. Kulesi sigaba, ungathumela ipharamitha kudivayisi njengenhlangano esibonakalayo. Kungaba ngezinhlobo eziningi. Lokhu kuhlanganisa isikhombimsebenzisi yayo siqu kusuka kunjiniyela. It wasetshenziselwa ngaphambili imodeli Enani. ukuthandwa kwakhe egqwalile emva ithuba ubuyekeze uhlelo lokusebenza of PC. Lokhu kwakubangelwa yokuthi emva yokuthengisa noma ukuthi i bancishwa nokwandisa esibonakalayo zabo ngaphansi kohlelo ezahlukene, futhi ngalokho, akukho kodwa angasebenzi.

Interface alandelayo lithole port okufanayo, okuyinto manje okutholakala amasampula junior scanner flatbed. Lezi amadivayisi sasivumela Okuqukethwe akuzwakali futhi musa sigqame. Basuke ngokuvamile okusetshenziselwa scan isithombe noma amakhasi ambalwa tetheksthi.

PCMCIA esibonakalayo lungatholwa kanini, kodwa okujwayelekile SCSI kuyinto amadivayisi nge high kanye nokusebenza. Manje nale interface ukukhiqiza umshini namandla kakhulu nge 30 futhi 36-bit.

-USB esibonakalayo - inketho zakamuva futhi imfashini. Yena ngenkuthalo Kunconywa amamodeli eziningi, Nokho, ngeke kumjabulise amadivayisi ephezulu.

okukhanyisa

Le ndlela akuvamile kunakwe lapho ekhetha Enani. Kukhona izinhlobo ezintathu ukukhanyisa:

• Xenon;
• Fluorescent;
• LED.

izibani Xenon ezincane, zingabantu futhi eside kuhluke kancane isikhathi elifudumele-up. Fluorescent ezishibhile ngokwanele, kodwa futhi ihlala isikhathi eside kakhulu. LED ezincane, kudle akanamandla futhi ngokushesha ukufuthelana. Ngokuvamile kuba yakamuva LED-scanner abhekwa quality ephakeme.

ukwehluka

Ngemva kokuba ngqo isithwebuli, ke sesibe Ushintshe futhi lungeza ngezindlela eziningi ezihlukahlukene. Manje kudivayisi kungenziwa labizwa enombolweni nemingcele. Izinhlobo scanner manje nezici zabo sezibe olwamukelwa, futhi kuze kube manje akukho innovation kulo mkhakha awuzange waphawula.

Ukuze aphule lezi amadivaysi ngezigaba, kubalulekile ukuba sicabangele izici ezilandelayo:

• Isithombe ukwakha indlela;
• isakhiwo mshini kinematic;
• uhlobo lwesithombe ngenjongo;
• izici uqobo;
• Interfaces: hardware ne-software.

izinhlobo

Ngakho, ungakwazi sithathe isithwebuli kuwo wonke nemingcele ngenhla. Kungaba:

• ithebhulethi;
• incwadi;
• mqulu;
• listopryazhnym;
• kwamaplanethi;
• isigubhu;
• ultrasound, njll

Ngokuvamile, izinhlobo isithwebuli eziningi. Sizobe khuluma ngezinto eziyisisekelo futhi ethandwa kakhulu.

I-Tablet okwamanje ethandwa kakhulu futhi kulula ukuyisebenzisa. Ngokuvamile, lolu hlobo imodeli izinga eliphezulu kakhulu futhi fast. Okucishe ukubukeka kwithebhulethi, nokunye lethiwa. Ukuze scan isithombe leli thuluzi, udinga ukuvula lid eshidini ingilazi lufakwa ibheke phansi, uvale lid bese ucindezela "ukuqala".

isithwebuli ngesandla akuyona injini. Ngakho-ke, ukucubungula isithombe, udinga ukuhambisa ngokwakho. Inzuzo enkulu onobuhle ezifana - intengo zabo. Kodwa yokuntula amaningi kakhulu: nesinqumo abampofu, ikhwalithi embi scan nesivinini kancane.

Incwadi isithwebuli yakhelwe ukusingatha imibhalo broshyurnyh. Ukuze scan ulwazi oludingayo, akudingekile nibabekele "ubuso", njengoba ku-tablet, futhi up. Quality muhle kakhulu.

isithwebuli Listopryazhny akusilo ukhululekile kakhulu. Ukucubungula ishidi idokhumenti usufakwa umqhewu welulele ngokusebenzisa imiphini ngaphakathi. Lokhu isithwebuli isebenza nge amafomethi athile futhi amashidi olulodwa.

kudivayisi yemihlaba isebenza nge amaphepha, okuyinto zilinyazwa kalula. It iqeda ukuxhumana into, lapho kungenzeka ukuba silondoloze ubuqotho impahla.

Drum iyunithi lapho amabhizinisi polygraphic futhi ukukhiqiza eliphezulu isithombe. scanner Slide sisebenze ifilimu amaslayidi. Barcode scanner sihlangana njalo sifika esitolo yemali. kudivayisi 3D into entsha-fangled. Kungaba scan izinto wangempela ukuthi eziguqulelwa efomini yedijithali futhi uguqule ibe imodeli unhlangothi-ntathu. Ultrasound Scanner - lokhu ultrasound abadumile, kusetshenziswa imithi ukufunda izitho zangaphakathi.

Four olulodwa

Kukhona umkhiqizo multifunction (MFP), okuyinto kuhlangene umshini wokunyathelisa module indlela ifeksi, iphrinta, Enani. Izimpawu ezahlukene zawo. Ngokuvamile, amadivayisi njenge kungaba inkjet, laser noma LED ukuphrinta technology. Njenganoma iyiphi isithwebuli, le MFP kungaba umbala noma ezinombala ofanayo.

Inzuzo enkulu leli thuluzi ubhekwa isikhala ekulondolozeni ekhaya noma ehhovisi. Umsebenzisi akudingeki ukuhambisa amaphepha wavela endaweni eyodwa kuya kwenye. Kuyinto elula ukusebenza nedivayisi eyodwa. MFP futhi ibe nenani sasivumela ongaphakeme, isihlobo kwinani ukuthi kuzodingeka ukuthi ukhokhe i-ukuthengwa instrument ngalinye.

Okusha ngo-2016

Uma ujwayelene izici isithwebuli, usungaqala ukucinga idivayisi. Lo nyaka kwakukhona onobuhle eziningi ezintsha ongaba nentshisekelo umsebenzisi. Ngokwesibonelo, HP ScanJet isithwebuli, isici okuyinto umxhwele, kungamenza alahlekelwe ruble 2000 nje. Kulokhu, wena izotholakala idivayisi ye 48-bit ukuskena, ethandwa isixhumi USB 2.0 ukujula umbala iyahambisana wokusebenza eziningi. Ngokuvamile, HP isithwebuli, isici ebesilokhu sikhishwa njalo ezingeni eliphezulu, abaholi emakethe kule ingxenye. Le nkampani futhi has onobuhle kakhulu amadivayisi multifunction.

Kulo nyaka, bavele emakethe futhi labo umxhwele hhayi imisebenzi, kodwa futhi intengo. Scanner Imininingwane Epson le Ukuphelela V850 Pro kakhulu ngempela. Ngaphandle kweqiniso lokuthi kule divayisi ithebhulethi has i-adaptha ukuze ifilimu ngezilayidi kanye USB 2.0 esibonakalayo, isici zako ezisemqoka kwaba isinqumo 6400 × 9600 dpi. Kanye nalezi ongakhetha intengo isithwebuli zokhahlamba kusuka ruble 80 kuya kwezingu-100.

Phakathi novelties kukhona kukho isabelomali. Scanner Canon CanoScan 9000F Okuqukethwe akuzwakali. isinqumo sakhe - 9600 × 9600 dpi. Intengo ruble ayizigidi ezingu-12. Izibuyekezo kule oyisibonelo "Quartet." Into wukuthi Abakhangisi futhi ubelethe "ingoma" yabo, echaza izinketho engakaze ibonwe. Eqinisweni, esikhundleni 48 izingcezu sithola 12. kuphela Lokho, e ukuhlola ichannel yinye ngayinye 16 esikhundleni izingcezu 12 nje. Noma kunjalo, kukhona labo weneliseka ijubane emsebenzini, isinqumo high futhi ikhwalithi izinto zedivayisi.

Ngokuvamile, ukukhetha isithwebuli ezinhle, ososayensi akudingeki ukuba, ikakhulukazi abasebenzisi abavamile. Ukuze scan amadokhumenti futhi amakhophi a lesinqumo high liyadingeka. Ultra high speed futhi ayibalulekile. Ngakho-ke kungcono ukukhetha isithwebuli ukuthi ngempela uzodinga e ukusebenza walo ngokugcwele.