Ana yin amfani da editan hotuna na hotuna a cikin hotuna.
Wannan zaɓi yana da ban sha'awa cewa ko da masu amfani da ba su san abin da ke cikin shirin ba zai iya jimrewa da sake dawowa hoto.
Manufar wannan labarin shine sake mayar da hotuna a Photoshop CS6, rage girman digiri zuwa ƙarami. Duk wani gyare-gyaren girman asalin zai rinjayi inganci, amma zaka iya bi ka'idodi masu sauƙi don adana tsabta daga wannan hoton kuma ku guje wa "ɓarna".
An ba da misalin a cikin Photoshop CS6, a wasu sigogi na CS da algorithm na ayyuka za su kasance kama.
Yanayin Hotuna
Alal misali, amfani da wannan hoton:
Babban darajar hoton da aka ɗauka tare da kyamarar kyamara ya fi girma fiye da hoton da aka gabatar a nan. Amma a cikin wannan misali, hoton yana matsawa don haka ya dace ya sanya shi a cikin labarin.
Rage girman a cikin wannan editan bazai haifar da wata matsala ba. Akwai menu don wannan zaɓi a Photoshop "Girman Hoton" (Girman hoto).
Domin samun wannan umurnin, danna maɓallin menu na ainihi. "Hotuna - Girman Hotuna" (Hotuna - Girman Hotuna). Hakanan zaka iya amfani da hotkeys. ALT + CTRL + I
A nan ne mai hotunan menu, ya dauki nan da nan bayan bude hotunan a cikin edita. Babu ƙarin canje-canjen da aka yi, an adana Sikeli.
Wannan akwatin maganganun na da nau'i biyu - Girma (Ƙananan Ƙari) da kuma Girman bugawa (Matsayin daftarin aiki).
Batu na kasa ba ya son mu, tun da yake ba ya danganta da batun darasin. Duba zuwa saman akwatin maganganu, wanda yake nuna girman fayil a cikin pixels. Wannan halayyar tana da alhakin ainihin girman hoto. A wannan yanayin, siffofin siffofi sune pixels.
Matsayi, Width da Dimension
Bari mu shiga binciken wannan menu daki-daki.
Zuwa dama na abu "Dimension" (Ƙananan Ƙari) Yana nuna adadi mai yawa da aka bayyana a lambobi. Suna nuna girman fayil din yanzu. Ana iya ganin cewa hoton yana ɗaukan 60.2 M. Harafi M tsaye ga megabyte:
Ganin yawan girman fayil ɗin da ake sarrafawa yana da mahimmanci idan kuna son kwatanta shi da asalin asali. Bari mu ce idan muna da kowane ma'auni don matsakaicin nauyin hoto.
Duk da haka, wannan baya rinjayar girman. Don ƙayyade wannan halayyar, zamu yi amfani da nisa da tsawo. Abubuwan da ke cikin duka sigogi suna nunawa pixels.
Hawan (Hawan) hoton da muke amfani da shine 3744 pixelskuma Width (Width) - 5616 pixels.
Don kammala aikin kuma sanya fayil mai zane akan shafin yanar gizo, kana buƙatar rage yawanta. Anyi wannan ta hanyar sauya bayanan lambobi a cikin jadawali "Girma" kuma "Height".
Shigar da darajar mai zurfi don nisa na hoto, alal misali 800 pixels. Lokacin da muka shiga lambobin, zamu ga cewa yanayin na biyu ya canza kuma yanzu 1200 pixels. Don amfani da canje-canje, danna maɓallin "Ok".
Wata hanya don shigar da bayanai game da girman hoton shine don amfani da girman girman girman asalin.
A cikin wannan menu, zuwa dama na filin shigar "Girma" kuma "Height", akwai menus saukarwa don rassa na auna. Da farko sun tsaya a ciki pixels (pixels), zaɓi na biyu na samuwa shine sha'awa.
Don canzawa zuwa lissafi na lissafi, kawai zaɓi wani zaɓi a cikin menu da aka saukar.
Shigar da lambar da ake buƙata a filin "Shawarwari" kuma tabbatar da latsawa "Ok". Shirin ya canza girman girman hoto daidai da shigar da adadin yawan.
Za'a iya la'akari da tsawo da nisa na hoto na dabam - daya halayyar cikin kashi, na biyu a cikin pixels. Don yin wannan, riƙe ƙasa da maɓallin SHIFT kuma danna a cikin filin da ake buƙata na rassa. Sa'an nan kuma muna nuna halaye masu dacewa a cikin filayen - percentages da pixels, bi da bi.
Dama da kuma shimfiɗar hoton
Ta hanyar tsoho, an saita menu ɗin don haka lokacin da ka shigar da nisa ko tsawo, wani halayyar an zaɓi ta atomatik. Wannan yana nufin cewa canji a cikin adadin lamuni na nisa kuma zai haifar da canji a tsawo.
Anyi wannan domin kiyaye adadin ainihin hoto. An fahimci cewa a mafi yawan lokuta zaka buƙaci sauƙi mai sauƙi na hoton ba tare da ɓarna ba.
Tsayar da hotunan zai faru idan kun canza fadin hoton, kuma tsawo ya kasance iri ɗaya, ko zaka iya sauya bayanan lambobi. Shirin ya nuna cewa tsawo da nisa suna dogara ne kuma suna canzawa daidai - wannan alamar ta nuna alamar haɗin haɗin zuwa hannun dama ta taga tare da pixels da kashi:
Halin tsakanin tsawo da nisa an ƙare a cikin kirtani "Ci gaba da samuwa" (Constrain Proportions). Da farko, ana duba akwati, idan kana buƙatar canza dabi'un da kansa, ya isa ya bar filin filin.
Lalacewar ingancin lokacin lalata
Canza girman hotuna a cikin Photoshop wani aiki ne maras muhimmanci. Duk da haka, akwai nuances da suke da muhimmanci a san su don kada su rasa ingancin fayil ɗin da aka sarrafa.
Don bayyana wannan mahimman bayani sosai, bari muyi amfani da misali mai sauki.
Yi tsammani kana so ka canja girman girman asalin - raba shi. Sabili da haka, a cikin Girman Hoton Hotuna na shigar 50%:
Lokacin da tabbatar da aikin tare da maɓallin "Ok" a taga "Girman Hoton" (Girman hoto), shirin ya rufe taga mai tushe kuma ya shafi saitunan da aka sabunta zuwa fayil din. A wannan yanayin, yana rage siffar ta rabi daga girman asali a nisa da tsawo.
Hoton, kamar yadda ake gani, ya ragu sosai, amma ingancinta ya sha wuya.
Yanzu za mu ci gaba da yin aiki tare da wannan hoton, wannan lokacin za mu ƙara shi zuwa girman girmansa. Bugu da ƙari, bude wannan akwatin maganganu na Girman Hotuna. Shigar da raɗin ma'aunin ma'auni, kuma a cikin filayen kusa da muke fitar da lambar 200 - don mayar da girman asali:
Har ila yau muna da hoto tare da irin halaye guda. Duk da haka, yanzu inganci mara kyau. Yawancin bayanai sun ɓace, hotunan yana kallon "zamylenny" kuma ya yi hasara sosai. Yayin da karuwar ya ci gaba, asarar za ta karu, duk lokacin da ya lalata inganci da yawa.
Photoshop Algorithms A lokacin da ƙwanƙwasa
Lalacewar ingancin yana faruwa ne saboda wani dalili mai sauki. Lokacin da rage girman hoton ta amfani da zabin "Girman Hoton", Photoshop kawai ya rage hoton, cire fayiloli marasa mahimmanci.
Algorithm ya ba da damar shirin don kimantawa da cire fayiloli daga hoton, ba tare da asarar inganci ba. Sabili da haka, rage hotuna, a matsayin mai mulkin, kada ka rasa kwarewarsu da bambanci a kowane.
Wani abu shine karuwa, a nan muna fuskantar matsaloli. Idan ba a rage ba, shirin bai buƙatar ƙirƙira wani abu - kawai cire abin da ya wuce. Amma idan an buƙata karuwa, wajibi ne a gano inda Photoshop zai dauki pixels wajibi don girman hoton? An tilasta shirin ne don yanke shawara game da shigar da sababbin pixels, kawai samar da su a cikin hoto na ƙarshe.
Matsalar ita ce, lokacin da kara girma hoto, shirin yana buƙatar ƙirƙirar sababbin pixels waɗanda ba a gabatar ba a cikin wannan takardun. Har ila yau, babu wani bayani akan yadda yadda hotunan karshe ya kamata su duba, don haka Photoshop yana jagorancin saitattun algorithms idan ya ƙara sabon pixels zuwa hoton, kuma babu wani abu.
Ba tare da shakka ba, masu ci gaba sunyi aiki don kawo wannan algorithm kusa da manufa. Duk da haka, la'akari da hotunan hotuna, hanya don kara siffar wani bayani mai mahimmanci wanda zai ba da ƙananan ƙira a hoto ba tare da asarar inganci ba. A mafi yawancin lokuta, wannan hanya zai ba da babban hasara a kaifi da bambanci.
Ka tuna - sake mayar da hotuna a Photoshop, kusan ba damuwa game da asarar ba. Duk da haka, ya kamata ka guje wa karuwar girman hotuna, idan muna magana ne game da kiyaye hoto na ainihi.
