Ana amfani da edita Photoshop sau da yawa don auna hotuna.
Zaɓin zaɓi ya shahara sosai har ma masu amfani waɗanda ba su da cikakkiyar masaniya game da aikin shirin za su iya fuskantar sauƙin hotunan.
Asalin wannan labarin shine sake girman hotuna a Photoshop CS6, rage rage ƙimar inganci. Duk wani gyara na girman asalin zai shafi ingancin, koyaya, koyaushe zaka iya bin ka'idodi masu sauƙi don kula da tsinkayen hoton kuma ka guji “mara haske”.
An ba da misali a cikin Photoshop CS6, a cikin sauran sigogin CS algorithm na ayyuka zasu zama iri ɗaya.
Girman Hoton Hoto
Misali, yi amfani da wannan hoton:
Babban girman hoton da aka ɗauka tare da kyamara na dijital ya fi girma fiye da hoton da aka gabatar anan. Amma a cikin wannan misalin, hoton ya karye saboda a sanya shi cikin abubuwan da ya dace a cikin labarin.
Rage girman a cikin wannan edita bai kamata ya haifar da wata matsala ba. Akwai menu don wannan zaɓi a Photoshop "Girman hoto" (Girman hoto).
Don nemo wannan umarnin, danna maɓallin babban menu "Hoto - Girman hoto" (Hoto - Girman Hoto) Hakanan zaka iya amfani da hotkeys. ALT + CTRL I
Anan hotunan kariyar hoto na menu da aka dauka kai tsaye bayan buɗe hoton a cikin edita. Ba a sami ƙarin canji ba, an adana ma'aunin.
Wannan akwatin maganganu yana da katanga biyu - Dimokiradiyya (Girman Pixel) da Girman Buga (Girman daftarin aiki).
Blockan matashin baya amfani da mu, tunda ba shi da alaƙa da batun darasi. Mun juya zuwa saman akwatin tattaunawa, inda aka nuna girman fayil a cikin pixels. Wannan halayyar ne ke da alhakin girman hoton. A wannan yanayin, raka'arorin hoton su ne pixels.
Tayi, Balaga da kuma girman su
Bari mu bincika menu dalla-dalla.
Daga hagu na sakin layi "Ragewa" (Girman Pixel) yana nuna ƙimar adadi, wanda aka bayyana cikin lambobi. Sun nuna girman fayil ɗin yanzu. Ana iya ganin hoton yana ɗauka 60.2 M. Harafi M tsaye ga megabytes:
Yana da mahimmanci a fahimci girman fayil ɗin hoto wanda aka sarrafa idan kuna buƙatar kwatanta shi da hoto na asali. Nace, idan muna da wasu ka'idoji don girman nauyin hoto.
Koyaya, wannan baya tasiri ga girman. Don ƙayyade wannan halayyar, zamu yi amfani da alamun nuni da tsawo. An nuna alamun dabi'u duka biyun pixels.
Tashi (Tashi) hoton da muke amfani dashi Pixels 3744, da Nisa (Nisa) - 5616 pixels.
Don kammala aikin da sanya fayil mai hoto akan shafin yanar gizo, wajibi ne don rage girman sa. Ana yin wannan ta hanyar sauya bayanan lambobi a cikin zane. "Nisa" da "Height".
Shigar da sabani mai kyau don girman hoton, misali 800 pixels. Lokacin da muka shigar da lambobi, zamu ga cewa halaye na biyu na hoton shima ya canza kuma yana yanzu 1200 pixels. Don amfani da canje-canje, latsa Yayi kyau.
Wani zaɓi don shigar da bayanan girman hoto shine amfani da ɗari tare da girman hoton asali.
A cikin menu guda, zuwa dama daga filin shigarwar "Nisa" da "Height"Akwai menus-saukar menus na raka'a na ma'auni. Da farko suna tsaye ciki pixels (pixels), zabi na biyu shine sha'awa.
Don sauyawa zuwa lissafin ƙidaya, kawai zaɓi wani zaɓi a cikin jerin zaɓi.
Shigar da lambar da ake so a filin "Sha'awa" kuma tabbatar ta latsa Yayi kyau. Shirin yana sake girman hoton daidai da darajar ƙimar da aka shigar.
Tsayi da nisa na hoton ana iya la'akari da shi daban - halayyar ɗaya cikin kashi ɗaya, na biyu a pixels. Don yin wannan, riƙe madannin Canji kuma danna cikin filin naúrar da ake so. Sannan a cikin filayen muna nuna halaye masu mahimmanci - kashi-kashi da pixels, bi da bi.
Hoton Ratio da Budewa
Ta hanyar tsoho, ana saita menu ta wannan hanyar wanda lokacin da ka shigar da ƙima don faɗin ko tsawo na fayil ɗin, an zaɓi wani halayyar ta atomatik. Wannan yana nufin cewa canji a cikin ƙimar lambobi don girman shima zai haifar da canji mai tsayi.
Ana yin wannan ne don adana ainihin asalin hoton. An fahimci cewa a mafi yawan lokuta zai zama dole ne kawai rage girman hoton ba tare da murdiya ba.
Retora hoton zai faru idan kun canza nisa hoto kuma ku bar tsayin iri ɗaya, ko ku canza bayanan lambobi ba da izini ba. Shirin yana gaya muku cewa tsayin tsayi da nisa sun dogara kuma sun bambanta gwargwado - ana nuna wannan ta tambarin hanyar haɗin sarkar a hannun dama na taga tare da pixels da kashi:
Dogara tsakanin tsayi da fadi yana aiki a jere "Kula da rabbai" (Rage Matsayi). Da farko, akwai alamar rajista a cikin akwati, amma idan kuna buƙatar sauya halaye daban-daban, ya isa ya bar filin fanko.
Rashin inganci lokacin tsufa
Canza girman girma hotuna a cikin editan Photoshop aiki ne mara kan gado. Koyaya, akwai lambobi waɗanda suke da mahimmanci a sani don kada ku rasa ingancin fayil ɗin da aka sarrafa.
Don bayyana wannan batun a sarari, za mu yi amfani da misali mai sauƙi.
A ce kana so ka sake girman hoton na asali - ka rage shi. Sabili da haka, a cikin pop-up taga girman hoto Na shigar 50%:
Lokacin tabbatarwa tare da Yayi kyau a cikin taga "Girman hoto" (Girman hoto), shirin yana rufe taga mai dubawa kuma yana amfani da saitunan da aka sabunta akan fayil ɗin. A wannan yanayin, yana rage hoton ta rabi daga girman asali a faɗaɗa da tsawo.
Hoton, kamar yadda kake gani, ya ragu sosai, amma ingancinsa bai sha wahala sosai.
Yanzu muna ci gaba da aiki tare da wannan hoton, wannan lokacin ƙara shi zuwa ga girman sa. Kuma, buɗe akwatin maganganu guda girman hoto. Mun shigar da raka'a na ma'auni, kuma a cikin filayen dabai mukan fitar da adadi 200 - don mayar da ainihin girman:
Mun sake samun hoto tare da halaye iri ɗaya. Koyaya, yanzu ingancin bai yi kyau ba. Yawancin bayanai da yawa sun ɓace, hoton yana “wofi” kuma ya yi yawa mai kaifi. Tare da ci gaba da ƙaruwa, asara za ta ƙara ƙaruwa, a duk lokacin da ta ƙara ƙaruwa da inganci.
Algorithms na Photoshop don buguwa
Rashin inganci yana faruwa ne saboda dalili ɗaya. Lokacin rage girman hoton ta amfani da zaɓi "Girman hoto"Photoshop kawai yana rage hoto ta cire pixels marasa amfani.
Algorithm ya ba da damar shirin don kimantawa da cire pixels daga hoton, yin wannan ba tare da asarar inganci ba. Saboda haka, babban yatsa, a matsayin mai mulkin, kada kuyi hasara da bambanci kwata-kwata.
Wani abu kuma shine karuwa, anan matsaloli suna jiranmu. Game da raguwa, shirin ba ya buƙatar ƙirƙirar komai - kawai share ɓarnar. Amma lokacin da ake buƙatar haɓaka, ya zama dole a gano inda Photoshop zai sami pixels da suka dace don girman hoton? Shirin an tilasta shi da kansa yanke shawara a kan hade da sabon pixels, kawai samar da su a cikin babban girman hoto na ƙarshe.
Babban wahalar ita ce lokacin da ka faɗaɗa hoto, shirin yana buƙatar ƙirƙirar sabbin pixels waɗanda ba su kasance a baya ba a cikin wannan takaddar. Hakanan, babu wani bayani game da yadda ainihin hoton na ƙarshe yakamata ya yi kama, don haka Photoshop yana jagora ne kawai ta daidaitattun algorithms yayin ƙara sabon pixels a cikin hoton, kuma ba komai.
Ba tare da wata shakka ba, masu haɓakawa sunyi aiki tuƙuru don kawo wannan algorithm kusa da manufa. Koyaya, da aka ba da hotuna iri-iri, hanyar ƙara girman hoto itace matsakaiciyar shawara wacce zata baka damar ƙara girman hoto ba tare da rasa inganci ba. A mafi yawan lokuta, wannan hanyar za ta samar da babbar asara a cikin kaifi da bambanci.
Tuna - sake girman hoton a Photoshop, kusan ba tare da damuwa da asara ba. Koyaya, ƙara girman hotunan ya kamata a guji shi idan ya zo ga tabbatar da ingancin hoto na farko.
