Ukuba ngaba uhlalutya uxwebhu okanye ukhetha ikhamera yedijithali, abaninzi abantu badidekile malunga nokuba bangaphi iipikseli abayidingayo kumfanekiso. Enyanisweni, ezininzi i-SLR zekhamera zedijithali zithatha imifanekiso kwisisombululo sama-pixels angama-300 nge intshi eyinto enhle ngomfanekiso owenzelwe umshicileli wokushicilela. Sekunjalo, kukho ingqwalasela emininzi kwisisombululo ngokukodwa xa kuziwa kwiinkhamera zokuthengisa kunye nabashicileli.
Okokuqala, kubalulekile ukuqonda embalwa imiqathango ehambelana nobukhulu bezithombe kunye nesisombululo - PPI, DPI, kunye neMegapixel. Ukuba awuqhelani nale migaqo, okanye ufuna ukuhlaziywa, landela ikhonkco apha ngezantsi ngencazelo ecacileyo:
Iipilisi nge intshi (ppi) - Umlinganiselo wesisombululo somfanekiso esichaza ubungakanani bomfanekiso ozoprinta. Ukuphakanyiswa kwexabiso le-ppi, ukuprinta komgangatho olungcono oya kufumana-kodwa kuphela ukuya kwinqanaba. I-300ppi ngokuqhelekileyo ibonwa njengento yokunciphisa ibuyiselo xa ifika kwi-ink jet yokuprinta kwezithombe zedijithali.
Amachaphaza nge intshi (dpi) - Isilinganiselo sesisombululo soprinta esichaza ukuba mangaphi amachashazi einki afakwe kwiphepha xa umfanekiso uprintwa. Iiprinta ze-ink jet ze-quality jet zanamhlanje zinesombululo se-dpi kumawaka (1200 ukuya kuma-4800 dpi) kwaye iza kukunika iifoto zelungelo elimkelekileyo lezithombe kunye nesisombululo esingu-140-200 ppi, kunye neempendulo eziphezulu zeemifanekiso ezine-200-300 ippi resolution.
I-Megapixels (MP) - Iipekseli ezili-1, nangona le nombolo idla ngokukhawuleza xa ichaza isisombululo sekhamera yedijithali.
Xa uqikelela ukuba ungaphi na iipikseli ozifunayo, zonke ziphephe kwiindlela ozakusebenzisa ngayo isithombe kunye nobubanzi kunye nokuphakama kokuprinta. Nasi ishati esinobuchule ekukukhokela xa uqikelela ukuba ungaphi na iipikseli eziza kuyidinga ukuprinta iifoto eziqhelekileyo zesayizi kwiprinta ye-jet okanye nge-intanethi yokushicilela inkonzo.
5 MP = 2592 x 1944 pixels
Umgangatho ophezulu: 10 x 13 intshi
Umgangatho owamkelekileyo: 13 x 19 intshi
4 MP = 2272 x 1704 pixels
Umgangatho ophezulu: 9 x 12 intshi
Umgangatho owamkelekayo: 12 x 16 intshi
3 MP = 2048 x 1536 pixels
Umgangatho ophezulu: 8 x 10 intshi
Umgangatho owamkelekayo: 10 x 13 intshi
2 MP = 1600 x 1200 pixels
Umgangatho ophezulu: 4 x 6 intshi, 5 x 7 intshi
Umgangatho owamkelekileyo: 8 x 10 intshi
Ngaphantsi kwama-2 MP
Kuphela kulungele ukubukwa kwesikrini okanye izicatshulwa zesayizi. Khangela: Zingaphi iipikseli endizidingayo zokwabelana ngezithombe kwi-Intanethi?
Mkhulu kunama-megapixels ama-5
Xa ufika ngaphaya kwama-megapixels amahlanu, amathuba ukuba ungumfoto wezakhono usebenzisa i-high-end equipment, kwaye kufuneka ube ne-handle kwiingcamango zesayizi kunye nesisombululo.
IMadapixel Madness
Abavelisi bekhamera zeDamidi banqwenela ukuba bonke abathengi bakholwe ukuba i-megapixel ephezulu ihlala ilungile, kodwa njengoko ubona kwiteksi engenhla, ngaphandle kokuba unomshicileli we-jet yefomathi enkulu, nayiphi na i-megapixel engaphezu kwama-3 angaphezulu kunabantu abaninzi abaya kufuna.
Nangona kunjalo, kukho amaxesha apho ama-megapixel aphezulu angena ngokufanelekileyo. Ama-megapixel aphezulu anganika abathwebuli beentanda inkululeko yokutshala ngokugqithiseleyo xa bengenakufikelela kufutshane nesifundo njengoko bafuna. Kodwa i-trade-off kwi-megapixels ephezulu iifayile ezinkulu eziza kufuna indawo engakumbi kwimemori yakho yekhamera kunye ne-disk indawo yokugcina kwikhompyutha yakho. Ndiziva ukuba indleko yokugcinwa okongeziweyo yinto engaphezulu, ngokukodwa kula maxesha xa ubamba eso sithombe esingabalulekanga kwaye unokufuna ukuyiprinta ngefomathi enkulu yokwenza. Khumbula, unokuhlala usebenzisa isevisi yokuprinta inthanethi ukuba umshicileli wakho akakwazi ukuphatha ifomathi enkulu.
ILizwi Lokulumkisa
Kukho ulwazi oluninzi oluchazwe apha kodwa kubalulekile ukuba uqonde ukuba awukwandisi ixabiso leppi yesithombe kwi-Photoshop. ngokufikelela kwiSithombe> Ubukhulu beZithombe kunye nokwandisa ixabiso leSigqibo.
Into yokuqala eya kwenzekayo ifomati yokugcina yefayili kunye nomlinganiselo wezithombe ziya kukhula ngokukhawuleza ngenxa yenani elikhulu lamaphikseli afakwe kumfanekiso. Ingxaki yinkcazelo yombala kulezo iipekseli ezintsha, ngokubhetele, "ukuqiqa ngokugqibeleleyo" kwicandelo lekhompyutheni sibonga kwinkqubo yePolitiki. Ukuba umfanekiso unesisombululo ngaphantsi kwama-ppi angama-200 okanye ngaphantsi, akufanele sitshintshe umshicileli.
Kwakhona uyabona: Ndiyitshintsha njani ubungakanani bokushicilela befoto yedijithali?
Ukuhlaziywa nguTom Green