Pixels mu masendimita? Elementary ...

Nokuti vanenge tose nhasi, kana asiri munhu foni, digitaalinen kamera kana piritsi, une zvakawanda kana zvishoma dzakatsarukana kamera zvino akakunda chero nguva upenyu musha muunganidzwa harisi dambudziko. Panguva iyoyowo, nokugadzirisa parameters ari mifananidzo iri midziyo, vakawanda vari kushamisika sei kushandura pixels kupinda masendimita. Kana akaisa chisarudzo kukwirira, wawana chinguva chiduku kuti pikicha uye ugozvitumira pamusoro pomumbure kunogona refu uye matambudziko nokuda guru kukura. Ukuwo, munhu pasi chisarudzo ari inenge nguva dzose kureva chenhando.

Pixels mu masendimita: unofanira kuziva kuti kushandurwa?

First unofanira kuva akajeka pamusoro kuti Pixel iri. Kutaura zvazviri, iduku chedziviriro imwe Raster mufananidzo. Mune mamwe manzwi, ndiye dukuduku dot, dzakapendwa neimwe ruvara. Zvinofanira kucherechedzwa kuti kukura rimwe Pixel tiri kunofambira mberi uye kwete novimba nokurondedzerwa ari mudziyo. Kuti tinzwisise sei kutendeutsa pixels kuti masendimita, zvakakodzera kubata mumwe parameter rinokosha rinonzi DPI. Harisi arambe achirema pfungwa muzana padiki nyore. The makuru ndiwo, ndipo unopinza uye yepamusoro mufananidzo inotengwa. Usanyengedzwa, kuti panzvimbo zvatinosiita masendimita kuti Masvomhu kushandisa masendimita - padiki mushanduro kuona nyore, chete vanofanira kuyeuka nhamba: 1 padiki = 25,4 mm kana 2,54 masendimita anoramba kuwedzera kuti kudhindwa bhizimisi, kazhinji. kushandisa DPI = 300, sezvo zvinofungirwa kuti ziso munhu kupfuura 306 Dots por padiki iri nyore asingakwanisi kuona.

Fomura uye tsika

Pashure tichibata ose anodiwa parameters kushandurwa, mumwe anogona kuona zviri nyore nzira nokukurumidza exchange pixels kupinda masendimita. Original anodhinda Data dzinogona kuwanikwa faira ehupfumi kana parameters yacho kamera. The algorithm ndiyo zvinotevera: kutanga, unonyatsoruramisa kureba mativi ari pixels pamusoro mufananidzo uye kuwana DPI padiki hukuru, chipeta tsika idzi kushandura kuti 2,54 uye pixels ari masendimita. Sezvaunogona kuona, shanduro iri nyore chaizvo. The yemaitiro inogona kunyorwa muchimiro:

x = 2,54 * p / DPI, sezvamakaropafadzwa:

X - Kureba chikamu Photo mu masendimita,

peji - ruoko kukura mune pixels,

DPI - arambe achirema anodhinda chisarudzo.

Sei kuziva kukura chinovhara Pixel

Dzimwe nguva, nokuti zvinangwa hunoshanda zvinobatsira kuziva Dots vangani chitsvuku iri imwe sendimita pakati mudziyo kushandiswa. Nyore nzira Chokwadi, kuwana ichi chikamu mune redzidziso. Asi chii kana akanga refu akandwe kunze kana pane kusingajekeswi? Muchiitiko chino, unogona kungoti kuzarura chifananidzo, kureba uye upamhi, muna pixels, vanozivikanwa pachine, uye kuyera chete parameters rokutonga. Ipapo uchawana ukama vemapato uye vawane achida mugumisiro.

With zvishoma tsika

Ngatitii tinoda kudhinda pikicha hunhu A3 (mbiri Album mapeji) kuti yokuturika pamusoro porusvingo. Ndezvipi shoma nokurondedzerwa vanofanira chifananidzo chakadaro? Standard hukuru A3 ari 297 × 420 mm (29.7 X 42 cm). Nokuti Masvomhu vanoshandisa mureza kukosha 300 DPI. Maererano apa payakavakirwa: p = X * DPI / 2,54. Ipapo mufananidzo upamhi anofanira kanenge p = 42 * 300 / 2,54 = 12 600 / 2,54 ≈ 4961 px, uye kureba: p = 29,7 * 300 / 2,54 ≈ 3508 px.