Isihleli se-Photoshop sivame ukusetshenziselwa ukukala izithombe.
Inketho ithandwa kakhulu kangangokuba ngisho nabasebenzisi abangajwayelene ngokuphelele nokusebenza kohlelo bangahlangabezana kalula nezithombe zokuphinda bazilinganise.
Umongo wale ndatshana ukukhulisa usayizi wezithombe ku-Photoshop CS6, unciphise ukwehla ngekhwalithi. Noma yikuphi ukuguqulwa kobukhulu bokuqala koqobo kuzothinta ikhwalithi, noma kunjalo, ungahlala ulandela imithetho elula ukugcina ukucaca kwesithombe futhi ugweme "ukufiphala".
Isibonelo sinikezwe ku-Photoshop CS6, kwezinye izinhlobo ze-CS i-algorithm yezenzo izofana.
Imenyu yosayizi wesithombe
Ukwenza isibonelo, sebenzisa lesi sithombe:
Ubungako besithombe esithathwe ngekhamera yedijithali bukhulu kakhulu kunesithombe esivezwe lapha. Kepha kulesi sibonelo, isithombe siyisithutha ukuze sikwazi ukufakwa ngokulula esihlokweni.
Ukunciphisa usayizi okulesi sihleli akumele kudale ubunzima. Kukhona imenyu yalolu khetho e-Photoshop "Usayizi Wezithombe" (Usayizi wesithombe).
Ukuthola lo myalo, chofoza kuthebhu enkulu yemenyu "Image - Image Image" (Image - Image Image) Ungasebenzisa futhi ama-hotkeys. I-ALT + CTRL + I
Nasi isithombe semenyu esithathwe ngokushesha ngemuva kokuvula isithombe kusihleli. Akukho ukuguqulwa okwengeziwe okwenziwe, isilinganiso sigcinwe.
Leli bhokisi lengxoxo linamabhulokhi amabili - Isilinganiso (Ubukhulu be-pixel) kanye Phrinta usayizi (Usayizi Wombhalo).
Ibhulokhi eliphansi alisinaki, ngoba alihlobene nesihloko sesifundo. Siphendukela phezulu kwebhokisi lengxoxo, lapho kukhonjiswa khona usayizi wefayela ngamaphikiseli. Yisimo lesi esibhekene nosayizi wangempela wesithombe. Kulokhu, amayunithi wesithombe angamaphikiseli.
Ukuphakama, Ububanzi nobukhulu bawo
Ake sihlole imenyu ngokuningiliziwe.
Ngakwesokudla kwesigaba "Ubukhulu" (Ubukhulu be-pixel) kukhombisa inani lokulinganisa, elivezwe ngamanani. Zibonisa usayizi wefayela lamanje. Kuyabonakala ukuthi isithombe siyangena 60.2 M. Incwadi M imele ama-megabytes:
Kubalulekile ukuqonda ivolumu lefayela elicutshunguliwe uma udinga ukuliqhathanisa nesithombe sokuqala. Ithi, uma ngabe sinemigomo ethile yesisindo esiphezulu sesithombe.
Noma kunjalo, lokhu akukuthinti usayizi. Ukunquma lesi sici, sizosebenzisa izinkomba zobubanzi nokuphakama. Amanani wawo womabili lamapharamitha ayabonakala amaphikiseli.
Ukuphakama (Ukuphakama) isithombe esisebenzisa Amaphikseli angama-3744, futhi Ububanzi (Ububanzi) - Amaphikseli angama-5616.
Ukuqedela umsebenzi futhi ubeke ifayela elibonisa isithombe ekhasini le-web, kuyadingeka ukunciphisa usayizi walo. Lokhu kwenziwa ngokushintsha idatha yamanani kwigrafu. "Ububanzi" futhi "Ukuphakama".
Faka inani lokuphikisana ngobubanzi besithombe, ngokwesibonelo Amaphikseli angama-800. Uma sifaka izinombolo, sizobona ukuthi isimilo sesibili sesithombe sishintshile futhi sesikhona manje Amaphikseli ayi-1200. Ukufaka izinguquko, cindezela KULUNGILE.
Enye inketho yokufaka imininingwane ngosayizi wesithombe ukusebenzisa iphesenti ngosayizi wesithombe sokuqala.
Kumenyu efanayo, ngakwesokudla kwenkambu yokufaka "Ububanzi" futhi "Ukuphakama"Kunamamenyu wehlisela phansi amayunithi wesilinganiso. Baqale bame phakathi amaphikiseli (amaphikiseli), inketho yesibili ekhona inzalo.
Ukushintshela ukubalwa kwamaphesenti, vele ukhethe enye inketho kumenyu eyehlayo.
Faka inombolo oyifunayo endle "Intshisekelo" futhi uqinisekise ngokucindezela KULUNGILE. Uhlelo lukhulisa isithombe ngokuya ngenani lamaphesenti afakiwe.
Ukuphakama nobubanzi besithombe kungahle kubhekwe ngokuhlukile - isici esisodwa ngamaphesenti, owesibili ngamaphikiseli. Ukuze wenze lokhu, bamba ukhiye I-Shift bese uqhafaza kunkambu oyifunayo. Ngemuva kwalokho emasimini sikhombisa izici ezidingekayo - amaphesenti namaphikseli ngokulandelana.
Izilinganiso zezithombe ne-Stretch
Ngokuzenzakalelayo, imenyu ihlelwe ngendlela yokuthi lapho ufaka inani lobubanzi noma ukuphakama kwefayela, kusungulwa esinye isici ngokuzenzakalela. Lokhu kusho ukuthi ushintsho kunani lezinombolo lobubanzi futhi luzofaka ushintsho ekuphakameni.
Lokhu kwenziwa ukuze kulondolozwe ubukhulu bangempela besithombe. Kuyaqondakala ukuthi ezimweni eziningi kuzodingeka umane ukhulule isithombe ngaphandle kokuhlanekezela.
Ukunwebeka isithombe kuzokwenzeka uma uguqula ububanzi besithombe bese ushiya ukuphakama okufanayo, noma ushintsha imininingwane yamanani ngokunqumela. Uhlelo lukutshela ukuthi ukuphakama nobubanzi kuncike futhi kuyahlukahluka ngokulingana - lokhu kufakazelwa yilogo yeluchungechunge lokuxhuma ngakwesokunene sewindows ngamaphikseli namaphesenti:
Ukuxhomekeka phakathi kokuphakama nobubanzi kukhutshaziwe emugqeni "Gcina inani" (ICroprain Proportions). Ekuqaleni, kukhona uphawu lokuhlola ebhokisini lokuhlola, kepha uma udinga ukuguqula izimfanelo ngokuzimela, kwanele ukushiya insimu ingenalutho.
Ukulahleka kwekhwalithi lapho kukalwa
Ukuguqula ubukhulu bezilinganiso zezithombe kusihleli se-Photoshop kungumsebenzi omncane. Noma kunjalo, kukhona ama-nuances ukuthi kubalulekile ukwazi ukuze ungalahli ikhwalithi yefayela elicutshunguliwe.
Ukuchaza leli phuzu ngokucacile, sizosebenzisa isibonelo esilula.
Ake sithi ufuna ukukhulisa isithombe sokuqala - usikhafule. Ngakho-ke, efasiteleni le-pop-up lesayizi Yezithombe engingena kuzo 50%:
Lapho iqinisekisa nge KULUNGILE ewindini "Usayizi Wezithombe" (Usayizi wesithombe), uhlelo luvala iwindi le-pop-up futhi lusebenzisa izilungiselelo ezibuyekeziwe kufayela. Kulokhu, kwehlisa isithombe ngesigamu ukusuka kusayizi wokuqala ngobubanzi nokuphakama.
Isithombe, ngokubona kwakho, sehle kakhulu, kepha ikhwalithi yaso ayizange ihlupheke kakhulu.
Manje siyaqhubeka nokusebenza nalesi sithombe, kulokhu sikhulisa usayizi waso wokuqala. Futhi, vula ibhokisi lebhokisi lengxoxo elifanayo. Sifaka amayunithi wesilinganiso, futhi emasimini aseduze sishayela ngenombolo 200 - Ukubuyisela usayizi wokuqala:
Siphinde sibe nesithombe esinezimpawu ezifanayo. Kodwa-ke, manje ikhwalithi imbi. Imininingwane eminingi yalahleka, isithombe sibukeka "simfushane" futhi silahlekelwe kakhulu. Ngokwanda okuqhubekayo, ukulahleka kuzokhuphuka, isikhathi ngasinye siba sibi kakhulu ngekhwalithi.
I-Photoshop Algorithms Yokulinganisa
Ukulahleka kwekhwalithi kwenzeka ngesizathu esisodwa esilula. Lapho unciphisa usayizi wesithombe usebenzisa inketho "Usayizi Wezithombe"I-Photoshop imane yehlise isithombe ngokususa amaphikseli angenasidingo.
I-algorithm ivumela uhlelo ukuthi luhlole futhi lususe amaphikseli esithombeni, lokhu likwenza ngaphandle kokulahleka kwekhwalithi. Ngakho-ke, izithonjana, njengomthetho, ungalahli ubukhali futhi umehluko nhlobo.
Enye into ukwanda, lapha ubunzima silindele. Endabeni yokwehliswa, uhlelo aludingi ukusungula lutho - vele ususe okweqile. Kepha lapho kudingeka ukwanda, kuyadingeka ukuthola ukuthi i-Photoshop izowathola kuphi amaphikseli wevolumu yesithombe? Uhlelo luphoqelelwa ukuba lunqume ngokuzimela ngokufakwa kwamaphikseli amasha, umane uwavelise ngomfanekiso wokugcina owandisiwe.
Ubunzima bonke bokuthi uma usandisa isithombe, uhlelo ludinga ukudala amaphikseli amasha angazange abekhona kulo mbhalo. Futhi, akukho lwazi lokuthi isithombe sokugcina kufanele sibukeke kanjani, ngakho i-Photoshop imane iqondiswa ngama-algorithms ayo ajwayelekile lapho ingeza amaphikseli amasha esithombeni, futhi akukho okunye.
Ngaphandle kokungabaza, abathuthukisi basebenze kanzima ukuletha le algorithm eduze kwekhono. Noma kunjalo, unikezwe izinhlobo ezahlukahlukene zezithombe, indlela yokwandisa isithombe iyisisombululo esikuvumela ukuthi ukhulise isithombe kancane ngaphandle kokulahlekelwa yikhwalithi. Ezimweni eziningi, le ndlela izokhiqiza ukulahleka okukhulu ngokubukhali nangokungafani.
Khumbula - khulisa isithombe ku-Photoshop, cishe ngaphandle kokukhathazeka ngokulahleka. Kodwa-ke, ukwandisa usayizi wezithombe kufanele kugwenywe uma kuziwa ekugcineni ikhwalithi yesithombe eyisisekelo.
