Ipixels ngokweesentimitha? Sabaqalayo ...

Ngenxa yokuba phantse sonke namhlanje, ukuba akukho ifowuni, kwicamera yesuntswana okanye tablet, ukuba camera ngaphezulu okanye ngaphantsi endilisekileyo ngoku ukufaka nawuphi na umzuzu ubomi yokuqokelela ikhaya akuyongxaki. Kwangaxeshanye, nokulungelelanisa parameters imifanekiso kwi-elektroniki, abaninzi esazibuza indlela yokuguqulela kolunye pixels zibe cm. Ukuba ngaba umisela oku isisombululo phezulu kakhulu, ufumana ngokwephanyazo elincinane ukuba ifoto kwaye uyithumele ngapha komsebenzi womnatha inokuba obude yingxaki ngenxa yobukhulu enkulu. Kwelinye icala, unesisombululo esisezantsi phantse lonke kuthetha mgangathweni.

Ipixels ngokweesentimitha: kufuneka wazi ukuba iguqulelwe?

Okokuqala kufuneka ukuba sicacise malunga yintoni pixel na. Enyanisweni, kuba yeyona nto incinane umfanekiso yeraster. Ngamanye amazwi, ukuba ichaphaza elincinane, zipeyintwe umbala othile. Kufuneka kuqatshelwe ukuba ubungakanani pixel mnye engatshintshiyo kwaye kuxhomekeke iinkcukacha kwefowuni. Ukuze siqonde ukuguqula indlela pixels ukuba iisentimitha, kuyimfuneko ukujongana kwenye parameter ebalulekileyo ebizwa DPI. Kuyinto nje lexinene amanqaku-intshi. I elikhulu oko kukuthi, lo mfanekiso ezibukhali ngakumbi kwaye ezikumgangatho ophezulu ifunyenwe. Musa ukuqhathwa, ukuze endaweni iisentimitha njengesiqhelo ubalo kufuneka usebenzise intshi - intshi in translation ntoni ubone lula, kufuneka nje ukuba ukhumbule umlinganiselo: 1 intshi = 25,4 mm okanye 2,54 cm uhlala ukongeza ukuba baprintayo, ngokuqhelekileyo. sebenzisa dpi = 300, ekubeni kuthathwa ukuba iliso babantu amachaphaza ngaphezulu kwe 306 nge-intshi nje akakwazi ukubona.

Indlela kunye nokwenza

Emva kokuba bajongane zonke iparameters eziyimfuneko yokuguqulela, umntu ngokulula baphethe nendlela ukuguqula ngokukhawuleza pixels zibe cm. data print yoqobo ingafunyanwa kwi zobumnini ifayile okanye parameters lwecamera. I algorithm oku kulandelayo: kuqala, ngokwahlula ubude macala kwi pixels kumfanekiso uze ufumane nobukhulu intshi dpi, uze uphinda ezi amaxabiso ukuguqulela ukuya 2,54 kunye pixels ngokweesentimitha. Njengoko ubona, le nguqulelo ilula kakhulu. Ifomula angabhalwa ngohlobo:

x = 2,54 * p / dpi, apho:

x - ubude inxalenye ifoto ngokweesentimitha,

p - ubungakanani isandla e pixels,

dpi - resolution print mninzi.

Indlela ukwazi ubungakanani pixel screen

Ngamanye amaxesha, ngeenjongo ezithile kubalulekile ukuba uyazi amachaphaza ezininzi kangakanani webala equlethwe isentimitha kusetyenziswa imitha njalo. Indlela elula, Kakade ke, fumana olu phawu kule ncwadana yemigaqo. Kodwa kuthekani ukuba elide ayemkhuphele ngaphandle okanye akukho alukhankanywanga? Kulo mzekelo, ungenza uvule nje umfanekiso, ubude nobubanzi, xa pixels, baziwa kwangaphambili, yaye ukulinganisa enye parameters womda. Uya kwandula ufumane ukuzalana amaqela kwaye ufumane isiphumo oyifunayo.

Umntu aqhelisele kancinane

Masithi ufuna ukushicilela A3 photo indalo (amaphepha amabini icwecwe) ukuze uyixhome phezu kodonga. Zeziphi iinkcukacha ubuncinane kufuneka abe umfanekiso onjalo? nobukhulu Standard A3 yi 297 × 420 mm (29.7 x 42 cm). Kuba izibalo usebenzise ixabiso umgangatho 300 dpi. Ngokutsho wokubala ngasentla: p = x * dpi / 2,54. Emva koko ke ububanzi mfanekiso kufuneka ubuncinane p = 42 * 300 / 2,54 = 12 600 / 2,54 ≈ 4961 px, kwaye ubude: p = 29,7 * 300 / 2,54 ≈ 3508 px.