Ukukhetha Enani for ifilimu: imininingwane ewusizo

Ukuguqula ezingezinhle noma amaslayidi format wedijithali usebenzisa idivayisi ekhethekile - isithwebuli for ifilimu. Uhluka isithwebuli owandile wokuthi yakhelwe ukusingatha izithombe ezincane esobala, okuyinto abe lesinqumo high. Nakuba abaningi scanner flatbed anemisila amamojuli ekhethekile, ikuvumela ukuba ihlole amaslayidi, kodwa umkhiqizo etholwe ngenxa eliphansi.

Be-CCD (be-CCD) ukuskena izakhi kuphela anganikeza edingekayo ukudepha kwenkundla izithombe nge lesinqumo high. Ngakho-ke, zonke scanner zakhelwe befilimu nokusetshenziswa kwawo. Abanye onobuhle abe be-CCD umugqa owodwa. Kulokhu, lo ibhadalele edingekayo maqembu amathathu ngokusebenzisa okungekuhle. It usinika scan, kodwa akuphazamisi yi. Empeleni, i-ifilimu has a afanayo be-CCD, futhi digitizing isithombe kuvela pass olulodwa. Abanye onobuhle zisebenzisa pass esebenza ukunciphisa amaphutha isithombe sokugcina.

Kuvele ipharamitha kubalulekile lapho kufanele sinake lapho ukhetha isithwebuli iyona isinqumo optical. Ububanzi ifilimu ovamile uwukuthi 35 mm, futhi isithombe ngokwaso unamahlangothi ngisho ezincane. Ngakho-ke, inani lemithombo isinqumo optical kufanele okungenani 2400-dpi (amachashazi intshi ngayinye). Kukhona scanner ukuthi ahlinzeke 4800 futhi 5400 dpi. Nakuba ezingeni lamanje ubuchwepheshe ukufeza amagugu ngisho ephakeme, akunakwenzeka - ngisho usayizi esihle wokusanhlamvu ifilimu kuyoba Amaphikseli okuningi.

Ngokukhethekile kufanele kukhokhelwe uhla ashukumisayo noma ukuminyana optical. Ayanda ukubaluleka, ngcono isithwebuli angase adlulisele ezingezinhle halftone futhi abushelelezi umbala ukuhwebelana. Ukuze value qualitative we ukuminyana optical ukucutshungulwa ifilimu kufanele ibe uhla kuze kube 3,2 D 3.6 D. Zuza iphethini nge kwabantu mkhulu optical akwenzi mqondo, njengoba iningi mafilimu sibaluleke.

Izinga ibhadalele kuthinta futhi umfanekiso kancane emhlabeni, okuyinto ephawula ukukhiqizwa kabusha umbala. Modern isithwebuli ifilimu ungaba 42 noma 48 bit Isethulo sombala, kodwa processing format isetshenziswa kuphela ngaphakathi isithwebuli, futhi kusiza ekunciphiseni le "umsindo" ukuguqulwa. Isithombe has a standard-24-bit umbala wekhodi imishini computer.

Scanner slides ezimweni eziningi uxhumeke kwikhompyutha nge-USB-interface. Okuningi onobuhle ezibizayo kungenziwa ixhunywe nge SCSI-2 kanye IEEE 1394 (FireWire). Kulokhu, njalo ngokwanele okufakiwe ikhadi isilawuli idatha.

Scanner ifilimu cishe njalo has ihadiwe ukuze isithombe esinye isithuthukisi. Lokhu ICE Digital, okuvumela ukuba ususe uthuli isithombe nokuklwebheka, ngaphandle kokuphazamisa isithombe esikhulu, futhi Digital GEM, okuvumela ukuba kuqedwe graininess futhi Digital ROC, okuvumela ukubuyisela umbala egqwalile umbala izithombe kanye nezinye. Kaningi, ngalezi zindlela ehlangana kwelinye iphakethe Digital ICE4 Okuthuthukisiwe. Ukusebenzisa lezi ubuchwepheshe kuyandisa kakhulu scan, kodwa umphumela uba kakhulu. Ukuze kugucuka ezifanayo Photoshop kuzodinga isikhathi esiningi, futhi umphumela uba anisoze yibhange.