Zabar na'urar daukar hotan takardu don film: amfani bayanai

To maida rashinta ko nunin faifai zuwa dijital format ta amfani da musamman na'urar - na'urar daukar hotan takardu ga fim. Ya bambanta daga wata al'ada na'urar daukar hotan takardu da aka tsara don rike kananan m images, wanda suna da wani babban ƙuduri. Ko da yake da yawa flatbed Scanners suna sanye take da musamman kayayyaki, ba ka damar duba nunin faifai, amma samfurin da aka samu a sakamakon matalauta quality.

Kawai CCD (CCD) scanning abubuwa iya samar da ake buƙata zurfin filin for images tare da high ƙuduri. Saboda haka, duk Scanners aka gina domin fim da su yi amfani da. Wasu model da guda CCD line. A wannan yanayin, da digitization bukata uku kafa ta cikin korau. Yana kara da scan, amma ba zai tasiri a sakamakon. Amma, cikin fim na'urar daukar hotan takardu yana da wani CCD tsararru, kuma digitizing Hoton auku a wani guda izinin. Wasu model amfani reusable izinin don rage kurakurai a karshe image.

An muhimmanci siga ga wanda ya kamata ka kula a lokacin da zabar na'urar daukar hotan takardu ne Tantancewar ƙuduri. Da nisa da na kowa film ne 35 mm, da kuma image kanta tana ko karami girma. Saboda haka, da yawa daga Tantancewar ƙuduri ya kamata a kalla 2400 dpi (dige da inch). Akwai Scanners cewa samar da 4800 da kuma 5400 dpi. Ko da yake yanzu matakin na fasaha don cimma ma mafi girma dabi'u, shi ne impractical - ko da lafiya hatsi size daga cikin fim zai zama mai yawa fiye da pixels.

Musamman hankali ya kamata a biya zuwa tsauri kewayon ko Tantancewar yawa. A mafi girma da daraja, da mafi alheri da na'urar daukar hotan takardu iya aika da da halftone rashinta da m launi mulki. Domin ingantaccen darajar da na gani yawa daga cikin film aiki ya zama a cikin kewayon har zuwa 3,2 D 3,6 D. Saya juna tare da mafi Tantancewar yawa bai sa hankali, kamar yadda mafi yawan irin fina-finan da shi yana da darajar.

A ingancin da digitization rinjayar ma da bit misali na duniya, wanda characterizes launi haifuwa. Modern na'urar daukar hotan takardu film iya samun 42 ko 48 bit launi misali, amma a wani format aiki da ake amfani da kawai a cikin na'urar daukar hotan takardu, da kuma hidima don rage "amo" canji. A sakamakon image yana da wani misali 24-bit launi tsarinsa kwamfuta kayan aiki.

Scanner ga nunin faifai a mafi yawan lokuta haɗa zuwa kwamfuta via kebul-dubawa. More tsada model za a iya haɗa via SCSI-2 da IEEE 1394 (FireWire). A wannan yanayin, sau da yawa isasshen hada ne da wani katin tare da data kula.

Scanner film kusan ko da yaushe yana cikin hardware ga image kayan haɓaka aiki. Wannan Digital ICE, wanda damar cire daga image turɓãya da scratches, ba tare da shafi da babban image, da kuma Digital dutse mai daraja, wanda damar kawar da graininess kuma Digital ROC, kyale su mayar launi zuwa iri na launi hotuna da kuma sauran. Popular sau da yawa, wadannan nufin suna hade a daya kunshin digital ICE4 Advanced. Amfani da waɗannan kimiyoyi ƙwarai prolongs da scan, amma sakamakon da yake da kyau kwarai. Domin irin wannan canje a Photoshop za bukatar fiye da lokaci, da kuma sakamakon haka ne ba faufau tabbace.