Iifaneli zisebenza njani

Iskripthi sizala ubomi bakho kwidijithali ...

Ewe, kukho ezininzi iintlobo zeeskripthi, kodwa ezininzi zazo (ngaphandle, mhlawumbi, iiskrini zedrama ezisebenzisayo kwishishini lokushicilela) "idatha yokubamba" -kuba ngaba yimibhalo yombhalo, imifanekiso yoshishino, okanye iifoto, kuquka ifilimu, i-transparency, i-slides , kunye nemilinganiselo-ngendlela efanayo, esiyihloko sale nqaku. Ngaba umtshini wesitori uthatha iphepha lekopi, uvelise umxholo walo, kwaye uthumele loo datha kwifayile yekhompyutheni enokuyenza kunye nathi njengoko sithanda?

I-Device-Coupled Device (CCD)

Nangona i-scanners yenziwe ngamalungu amaninzi ahlukeneyo, njengezibuko, iilensi, i-motors, nokunye. Kule nkoliso yamanqaku omhla, nangona kunjalo, iqela eliphambili lixhobo elixhaseneyo (iCCD). Iqoqo yediodesi ezikhanyayo eziguqula iiphoton (ukukhanya) kwii-electron, okanye iindleko zombane, ezi zididi ziyaziwa ngokuqhelekileyo njengezithombe zeefoto .

Iifoto ezithintela ukukhanya; ukhanyisa ukukhanya okukhulu kunkokhelo kagesi. Ngokuxhomekeke kumzekelo we-scanner, umfanekiso oqatshelwe okanye umqulu ufumana indlela eya kwi-CCD uluhlu ngokusebenzisa iilensi zechungechunge, iifayile kunye nezibuko. Ezi zixhobo zenza i- head scan . Ngethuba leprogram yokukhangela, inhloko yeskena iyadluliselwa kwijolisi (into echongiweyo).

Ngokuxhomekeka kwiskena, ezinye zihamba-nye kunye nezinye zihamba-ezintathu, oku kuthetha ukuba bathabatha into echithwe kuyo enye idlule okanye ezintathu, ngokulandelanayo. Kwi-scanner ye-three-pass, ipasipoti nganye ithatha umbala ohlukileyo (obomvu, obomvu, okanye obomvu), kwaye i-software iphinda ifane neendlela ezintathu zemibala yeRGB, ukubuyisela umfanekiso wokuqala.

Ngamhla, ezininzi i-scanners zihamba ngomnye-mnye, kunye ne-lens eyenza ukuhlukana kweendlela ezintathu zemibala, ngaphandle kokuba umsebenzisi abe nobulumko.

Qhagamshelana ne Sensor Image

Enye, iteknoloji yokudlala i-imaging engabizi ngaphantsi kwehlabathi ukufumana indawo esandula kutshanje ifowuni yomnxeba (CIS). I-CIS ithatha indawo yendawo yeCCD, kunye nesilungiselelo sayo sezibuko, izihlunu, isibane, kunye neelensi, kunye nemigca ebomvu, eluhlaza, kunye ne-blue (RGB) ekhanyayo. Apha, umenzi wesikhombisi somfanekiso unamaqondo angama-300 ukuya kuma-600 anokwenza ububanzi bomhlaba okanye iskena. Ngexesha lo mfanekiso uchithwa, ii-LED zidibanisa ukubonelela ngokukhanya okumhlophe, kukhanyisa umfanekiso, ozobe uwathathwa ngabenzi.

I-scanners ye-CIS ayinikezeli ngokulinganayo izinga lekhwalithi kunye nesisombululo esihanjiswa ngamashishini asekelwe kwi-CCD, kodwa ke okokuqala bekuncinci, baqhathaniswa kwaye banancinci.

IsiGqibo kunye noBanzi beMbala

Ziziphi izigqibo onokuzihlola kuzo kuxhomekeke apho uceba ukusebenzisa umfanekiso. Ukuhlola iikhompyutheni, iipilisi, kunye ne-smartphones akunakwenzeka ukubonisa izigqibo ezingaphezu kwama-72 amachasi nge intshi (dpi), kunye nabagadi be-HD abancedisa ama-96dpi. Into eyenzekayo xa uhlola umfanekiso kwisisombululo esiphezulu kunokuba singabonakaliswa, idatha engaphandle ikhutshwe nje, eqinisweni ithatha ixesha.

Iifoto kwiincwadana zakho eziphezulu zokugqibela kunye nezinye izinto, ngakwelinye icala, zineendaba ehlukileyo. Ngezona ziphumo ezifanelekileyo, kufuneka uhlale uzihlola nge - 300dpi, kwaye ziphezulu, ziphezulu kakhulu, ukuba kunokwenzeka-kuphela xa ufuna ukukhulisa umfanekiso ngexesha lokulungiswa.
Ukujongwa kombala kuchaza inani lemibala umfanekiso othile (okanye ukukhangela) iqulethe. Amathuba angama-8-bit, i-16-bit, i-24-bit, i-36-bit, i-48-bit, kunye ne-64-bit, kunye neyokuqala, i- 8-bit, ixhasa imibala engama-256 okanye i-shades ye-grey kunye ne- 64-bit eyi- trillions esekelayo . imibala-kakhulu kunokuba iliso lomuntu likwazi ukuqonda.

Ngokucacileyo, ngenxa yezizathu, izisombululo eziphezulu kunye nobunzulu obunzulu bombala buyandisa izinga lokuskena, kunye nesizathu, kunjalo. Imibala, umgangatho, kunye neenkcukacha kufuneka zibe khona ngaphambi kokuba uhlole. Kungakhathaliseki ukuba yintoni i-scanner yakho enhle, ingawenza imimangaliso.