Kungakhathaliseki ukuthi kuthwetshulwa idokhumenti noma ukhethe ikhamera yedijithali, abantu abaningi badidekile ngokuthi bangaki amaphikseli abawadingayo esithombeni. Eqinisweni, amakhemikhali amaningi e-SLR athatha izithombe ngesinqumo sama-pixel angu-300 ngamasentimitha amahle ngesithombe esenzelwe umshini wokunyathelisa. Noma kunjalo, kugxile kakhulu ekuxazululweni ikakhulukazi uma kuziwa ekukhangiseni amakhamera namaphrinta.
Okokuqala, kubalulekile ukuqonda imigomo embalwa ehlobene nobukhulu besithombe nesinqumo - PPI, DPI, nama Megapixel. Uma ungajwayelene nale migomo, noma udinga ukuvuselela, landela izixhumanisi ngezansi ukuze uthole incazelo eningiliziwe:
Amaphikseli nge intshi (ppi) - Isilinganiso sesinqumo sesithombe esichaza usayizi isithombe sizophrinta. Okuphakeme kwe-ppi value, ukuphrinta kwekhwalithi engcono uzothola - kodwa kuphela kuze kube iphuzu. I-300ppi ngokuvamile ibhekwa njengento yokunciphisa ukubuyisa uma kuziwa ekunyathelweni kwe-ink jet kwezithombe zedijithali.
Amachashazi nge intshi (dpi) - Isilinganiso sesinqumo sephrinta esichaza ukuthi mangaki amachashazi eyinki efakwe ekhasini uma isithombe sinyatheliswa. Izindatshana ze-ink jet zanemifanekiso zanamuhla zinezinqumo ezinkulungwaneni (1200 kuya ku-4800 dpi) futhi izokunika izithombe ezamukelekayo zezithombe ezinemifanekiso engu-140-200 ppi isinqumo, kanye nezithombe eziphezulu zezithombe ezinezixazululo ezingu-200-300 ze-ppi.
Ama-Megapixel (MP) - Amaphikseli ayizigidi, nakuba le namba ivame ukujikelezwa lapho ichaza ukuxazulula ikhamera yedijithali.
Uma unquma ukuthi ungaphi ama-pixels owudinga, konke okupheka phansi ukuthi uzosebenzisa kanjani isithombe nobubanzi nokuphakama kokuphrinta. Nasi ishadi elihle lokukuqondisa uma unquma ukuthi zingaki amaphikseli ozodinga ukunyathelisa izithombe zesayizi ezijwayelekile kuphrinta ye-jet noma nge-inthanethi yokuphrinta isevisi.
5 MP = 2592 x 1944 amaphikseli
Ikhwalithi Ephezulu: 10 x 13 amasentimitha
Ikhwalithi Emukelekayo: 13 x 19 amayintshi
4 MP = 2272 x 1704 amaphikseli
Ikhwalithi Ephakeme: 9 x 12 amasentimitha
Ikhwalithi Emukelekayo: 12 x 16 amayintshi
3 MP = 2048 x 1536 amaphikseli
Ikhwalithi Ephakeme: 8 x 10 amayintshi
Ikhwalithi Emukelekayo: 10 x 13 amasentimitha
2 MP = 1600 x 1200 amaphikseli
Ikhwalithi Ephezulu: 4 x 6 amayintshi, 5 x 7 amayintshi
Ikhwalithi Emukelekayo: 8 x 10 amayintshi
Ngaphansi kwe-2 MP
Kuphela okufanelekile ukubukwa kwesikrini noma ukukhishwa kwamasikwele. Bheka: Mangaki ama-pixel engiwadingayo ukuze ngabelane ngezithombe ku-intanethi?
Ikhulu kunama-megapixel angu-5
Uma ufika ngaphezu kwama-megapixel amahlanu, amathuba ukuthi ungumthwebuli wezithombe osebenzayo usebenzisa imishini ekugcineni, futhi kufanele usuvele unesibambiso emibonweni yesayizi nesithombe.
I-Megapixel Madness
Abakhiqizi bekhamera yedijithali bangathanda wonke amakhasimende ukuthi akholelwe ukuthi ama-megapixels aphezulu ahlala njalo kangcono, kodwa njengoba ungabona kusuka eshadini elingenhla, ngaphandle kokuthi unephrinta ye-jet enkulu yefomethi yefomethi, noma yini engaphezu kwama-megapixel angu-3 angaphezulu kunabantu abaningi abazoyidingeka.
Noma kunjalo, kunezikhathi lapho ama-megapixel aphezulu angena khona. Ama-megapixels aphezulu anganikeza abathwebuli bezithombe ithuba lokutshala kakhulu uma bengenakufinyelela eduze nendaba njengoba bengathanda. Kodwa ukuhweba kuya kuma-megapixel aphakeme ngamafayela amakhulu azodinga isikhala esiningi kwimemori yekhamera yakho kanye nendawo eyengeziwe yokugcina isitoreji kukhompyutha yakho. Ngizizwa ukuthi izindleko zesitoreji esingeziwe zingaphezu kokubaluleka, ikakhulukazi kulawo maxesha lapho uthatha isithombe esingabizi futhi angase asifune ukukuphrinta ngefomethi enkulu yokwakha. Khumbula, ungakwazi njalo ukusebenzisa isevisi yokuphrinta inthanethi uma iphrinta yakho ingakwazi ukusingatha ifomethi enkulu.
Izwi Lokuqapha
Kukhona ulwazi oluningi olwethulwa lapha kodwa kubalulekile ukuthi uqonde ukuthi umane ukwandisa inani le-ppi lesithombe ku-Photoshop. ngokufinyelela Image> Size Image bese ukwandisa value Isinqumo.
Into yokuqala ezokwenzekayo isayizi yefayela yokugcina nobukhulu bezithombe kuzoba nokwanda okuphawulekayo ngenxa yenani elikhulu lamaphikseli angeziwe esithombeni. Inkinga imininingwane yolwazi kulawo maphikseli amasha, okungcono, "ukuqagela okungcono kakhulu" engxenyeni yekhompyutha kubonga inqubo ye-Interpolation. Uma isithombe sinakho isinqumo esingaphansi kuka-200 ppi noma ngaphansi, akufanele sishaye ucingo.
Futhi ubone: Ngishintsha kanjani usayizi wokuphrinta wesithombe se-digital?
Kubuyekezwe ngu-Tom Green