Scanners haifa rayuwarka a duniyar duniyar ...
Haka ne, akwai wasu nau'o'in scanners, amma yawancin su (sai dai, watakila, maƙalar drum da aka yi amfani da shi a cikin masana'antun wallafe-wallafen) "kama" bayanai-zama rubutun littattafai, kasuwancin kasuwanci, ko hotuna, ciki har da fim, transparencies, slides , da kuma halayyar juna-irin wannan hanya, wanda shine batun wannan labarin. Yaya yadda na'urar daukar hotan takardu ta ɗauki takarda mai tsabta, sake haifar da abun ciki, sa'an nan kuma canja wurin wannan bayanin zuwa fayilolin kwamfuta da ku da ni zan iya yi da yadda muke so?
Kayan da aka yi da caji (CCD) Array
Duk da yake ana amfani da samfurori da sassa daban-daban, irin su madubai, ruwan tabarau, motos, da sauransu. A yawancin labaran yau, duk da haka, ainihin mahimmanci shine haɗin da aka ɗauka wanda aka haɗa da shi (CCD). Tarin diodes masu haske wanda ke canza sautin photons (haske) zuwa electrons, ko cajin lantarki, waɗannan diodes sun fi sani da hotuna .
Hotunan hotuna suna kula da haske; ƙarin haske ya fi girma cajin lantarki. Dangane da samfurin na'urar daukar hotan takardu, samfurin da aka bincikar da shi ya samo hanyoyin zuwa CCD ta hanyar tabarau, zane, da madubai. Wadannan matakan sun zama saman kai . A lokacin nazarin dubawa, an cire mahimmancin kallo akan manufa (abu da ake bincikar).
Dangane da na'urar daukar hotan takardu, wasu suna wucewa guda ɗaya kuma wasu suna haɗuwa guda uku, wanda ke nufin sun ɗauki abin da ake dubawa a kowane ɗaya ko uku, daidai da haka. A kan na'urar daukar hotunan fasinja uku, kowace fassarar ta samo wani launi daban (ja, kore, ko blue), sannan software zata sa tashoshin launi na RGB guda uku, maidowa ainihin hoton.
A zamanin yau, mafi yawan masarufi suna wucewa guda ɗaya, tare da ruwan tabarau na yin daidaitattun sassan layin launi guda uku, ba tare da mai amfani ba ne mafi hikima.
Sanin Hoton Hoton Hotuna
Wani fasaha na tsararren fasaha wanda ba ta da tsada don samun wasu kwanan nan shine na'urar firikwensin lambar sadarwa (CIS). CIS ta sauya tsarin CCD, tare da tsara ta madubai, filters, fitilar, da ruwan tabarau, tare da layuka na red, kore, da kuma blue (RGB) mai diodes (LEDs). A nan, ma'anar firikwensin hotunan ya ƙunshi nau'i 300 zuwa 600 wanda ya ninka nisa daga cikin garkuwa ko maɓallin dubawa. Duk da yake an duba hotunan, LEDs suna haɗuwa don samar da haske mai haske, haskaka hoton, wanda aka kama ta na'urori masu auna sigina.
CIS masu binciken ba yawanci suna samar da nau'in ma'auni da ƙuduri da na'urorin CCD ke kawowa ba, amma kuma tsohon ya fi dacewa, haske, kuma mai rahusa.
Resolution da zurfin launi
Wace shawarwari da ya kamata ka duba a dogara da inda kake shirya don amfani da hoton. Kwamfuta na kwamfuta, Allunan, da wayoyin hannu ba za su iya nuna nuni ba game da kusoshi 72 a kowace inch (dpi), tare da masu saka idanu na Windows masu goyon bayan 96dpi. Abinda ya faru ne idan ka duba hoto a ƙuduri mafi girma fiye da yadda za a iya nuna shi a, an ƙayyade bayanan bayanan, wanda, ba shakka, yana ɗaukar lokaci.
Hotunan da ke cikin manyan littattafanku da sauran matsakaici, a gefe guda, su ne labarin daban. Domin mafi kyawun sakamakon, ya kamata ka ko da yaushe duba su a akalla 300dpi, kuma mafi girma, mafi girma, idan za ta yiwu-kawai idan akwai buƙatar ka kara girman hoto yayin layout.
Girman launi yana nuna yawan launuka a hoto (ko scan) ya ƙunshi. Abubuwan da suke da shi sune 8-bit, 16-bit, 24-bit, 36-bit, 48-bit, da 64-bit, tare da tsohon, 8-bit, suna goyon bayan 256 launuka ko tabarau na launin toka da 64-bit goyon baya na launuka-fiye da yadda ido na mutum zai iya ganewa.
Babu shakka, a cikin dalili, babban shawarwari da zurfin launi suna inganta ingancin hoto, tare da dalili, ba shakka. Launi, da inganci, da dalla-dalla dole su kasance a can kafin ka duba. Duk yadda kullin na'urarka ya fi kyau, zai iya yin mu'ujjizai.