Khetha i-scanner yefilimu: ulwazi oluncedo

Ukutshintshisa iimpazamo okanye ama-slide kwifomati yedijithali, sebenzisa ifowuni ekhethekileyo-isithwebuli sefilimu. Ihluke kwi-scanner eqhelekileyo ekubeni yenzelwe ukujongana nemifanekiso encinane ebonakalayo enezigqibo eziphezulu. Nangona ezininzi iiskripthi zeplatikhi zixhotyiswe ngeemodyuli ezikhethekileyo ezikuvumela ukuba uhlaziye isilayidi, kodwa umkhiqizo ofunyenweyo ngenxa yoko awukho mgangatho ophezulu.

Izinto ze-CCD (Screens) kuphela zokukhangela ziza kunika ubunzulu obufunekayo bensimu kwimifanekiso echanekileyo. Ngoko ke, zonke iiskrini zefilimu zakhiwa ngokusetyenziswa kwazo. Ezinye iimodeli zinomgca omnye weCCD. Kule meko, ipasipoti emithathu yezinto ezimbi iyadingeka ukukhishwa kwesigcino. Oku kuyandisa ixesha lokukhangela, kodwa alichaphazeli umphumo walo. Ngokuqhelekileyo, i-scanner yefilimu ine-matrix ye-CCD, kwaye umfanekiso uphawulwa kwipasiti enye. Ezinye iimpawu zisebenzisa iipasiti ezihlaziyiweyo zokunciphisa amaphutha kumfanekiso obangelwayo.

Iparameter ebalulekileyo, efanelekileyo ukuthobela ingqalelo xa ukhetha i-scanner, isisombululo sokujonga. Ubanzi befilimu eqhelekileyo yi-35 mm, kwaye umfanekiso ngokwawo uncinci. Ngoko ke, isisombululo se-optical kufuneka sibe ubuncinane ngama-2400 dpi (amachaphaza nge intshi). Kukho ama-scanner anika ama-4800 kunye nama-5400 amachaphazi nge intshi. Yaye nangona inqanaba letheknoloji yanamhlanje livumela ukufezekisa iimpawu ezininzi, akufanelekanga - ubungakanani bokhusana bhanya nefilimu egciniweyo luya kuba lukhulu kunepikelli.

Ingqwalasela ekhethekileyo kufuneka ihlawulwe kwibala elinobuchule okanye ubuninzi bezinto. Ukuphakama kwexabiso le parameter, bhetele i-scanner yamanqaku angadlulisa i-halftones kunye nokuguqulwa kwemibala epholileyo. Ukuqhutyelwa kwekhwalithi ephakamileyo, i-optical strengthiness should be in the range from 3.2 D ukuya kwi-3.6 D. Akukho ndawo ekufumaneni imodeli enoxinano oluthe xaxa, kuba uninzi lwazo ifilimu zichanekileyo ngokunjalo.

Umgangatho wokukhishwa kwe-digitization uphelelwe kwakhona ngokubanzi ubuncinane bokumelwa kokukhanya, okubonisa ukuba umbala wemibala. I-scanner yamanje yefilimu inokuba nommeli wobubala obuneminyaka engama-42 okanye engama-48, kodwa ukucwangciswa kule fom isetyenziswa kuphela ngaphakathi kwe-scanner kwaye kunceda ukunciphisa "ingxolo" yokuguqulwa. Umphumo obangelwayo unomgangatho omiselweyo wokubala umbala we-24-bit yekhompyutha yehadiweyo.

I-scan scanners kwiimeko ezininzi zixhunywe kwikhompyutheni nge-USB. Iimodeli ezingabizi zininzi zingaxhunyezwa nge-SCSI-2 kunye ne- IEEE 1394 (FireWire). Kule meko, ngokuphindaphindiweyo kwiphakheji kukho ibhodi elinalo mlawuli.

Umseshini wefilimu phantse unamaxesha onke asebenza ngeekhompyutha zokuphucula umfanekiso. Le yi-Digital ICE, evumela ukuba ususe uthuli kunye nemijelo emfanekisweni ngaphandle kokuchaphazela umfanekiso ophezulu, kunye ne-Digital GEM, ekhupha i-R40, kunye ne-Digital ROC, evumela ukuba ubuyisele imibala kwiifoto ezityhilekileyo, njl. Digital ICE4 Advanced. Ukusebenzisa ubu buchwepheshe buyandisa ixesha lokukhangela, kodwa isiphumo esihle kakhulu. Ukuba ukuguqulwa okufanayo kwi-Photoshop kuya kuthatha ixesha elingakumbi, kwaye umphumo awukho nhlobo eqinisekisiwe.