Imikhawulo yengemuva le-JPG: lokho ifomethi engakwazi ukuyigcina
I-JPG ayikwazi ukugcina ingemuva elibonisa ngale. Wonke amaphikseli ku-JPG kufanele anqume ukuba nombala obonakalayo, ngakho isinqamuleli esilondolozwe njenge-JPG sicaba siqhathaniswa nomhlophe, omnyama, noma omunye umbala okhethiwe. Uma udinga indawo ezungeze isihloko ukuze ihlale ingenalutho, thumela i-PNG esikhundleni salokho.
Lo mkhawulo awenzi i-JPG isithombe somthombo omubi. Kusho ukuthi i-JPG kanye nokuphumayo okusobala kunemisebenzi ehlukene.
Okushiwo “ukungakwazi ukugcina obala” kusho
I-cutout iqukethe izinhlobo ezimbili zolwazi:
- umbala obonakalayo wesihloko;
- ukuthi iphikseli ngalinye kufanele libonakale kanjani, okuhlanganisa namaphikseli onqenqema angenalutho ngokuphelele futhi abonisa ngale.
Ingxenye yesibili ngokuvamile ibizwa ngokuthi i-alpha. I-JPG ayinayo indawo yokuyigcina.
Uma isofthiwe iguqula ukusika okukhanyelayo kube i-JPG, kufanele inqume ukuthi yimuphi umbala obonakalayo othatha indawo yawo wonke amaphikseli angenalutho. Umphumela uba unxande ophelele futhi. Ngokuvamile lokho kushintsha kuba mhlophe, kodwa kungase kube mnyama noma noma yikuphi ukugcwalisa okukhethiwe.
Akukho okungalungile ngefayela. Ulwazi olusobala lususiwe ngenxa yokuthi ifomethi yendawo ayikwazi ukukuthwala.
Ukuze uthole isingeniso sesiNgisi esicacile se-alpha, bona okuthi What is a transparent PNG?.
JPG isengaba okokufaka
Izithombe eziningi zekhamera nezefoni ziyizithombe ezijwayelekile ezinonxande. Bafika negumbi, udonga, umgwaqo, noma indawo yokuphumula isivele ibonakala ngemuva kwesihloko. Lokho kwenza i-JPG ibe okokufaka okuvamile kokususwa kwengemuva.
Uhlelo lokusebenza lulula:
- vula umthombo we-JPG;
- hlukanisa isihloko;
- hlola futhi ucwenge usebe;
- thekelisa umphumela omusha njenge-PNG.
Umthombo nokuphumayo akudingi ukusebenzisa ifomethi efanayo. Guqula isithombe se-JPG sibe i-PNG esobala uhamba kulowo msebenzi ngokuqondile.
Kungani ingemuva elimhlophe lingadukisa
Ukusikwa kokumhlophe kungase kubonakale kukhanye uma kubukwa ekhasini elimhlophe. Ihambise kusilayidi esimnyama bese ipuleti elimhlophe elingunxande liba sobala.
Sebenzisa lokhu kuhlola okusheshayo:
- beka isithombe phezu kombala ogqamile ongamhlophe;
- bheka amagumbi amane;
- hlola izikhala ezingalweni, izibambo, nezinwele.
Uma umbala wokuhlola ungabonisi ngalezo zindawo, ifayela liyisicaba. Igama lefayela elithi .jpg liqinisekisa ukuthi kungani. Igama lefayela elithi .png lingasekela ukubonakala, nakuba i-PNG kungenzeka ukuthi isathunyelwe ngamabomu ngokugcwaliswa okungaguquki.
Okumhlophe umbala. Ukubonisa ngale ukungabikho kwamaphikseli angemuva abonakalayo.
Imiphetho ethambile yembula omunye umkhawulo
Ukusika okuhle akuhlali njalo kunomngcele oqinile. Izinwele, uboya, indwangu, izithunzi, namajika aphikisana ne-aliased angaqukatha amaphikseli onqenqema abonakala kancane. I-Alpha ivumela lawo maphikseli ukuthi ahlangane nengemuva elisha.
Uma unqenqema olubonisa ngale luyisicaba lube yi-JPG, unqenqema luhlanganiswa nombala owodwa ongashintshi. Beka leyo JPG kumbala ohlukile futhi ungase ubone:
- uhlaka olukhanyayo;
- umphetho omnyama;
- amakhona amabhokisi azungeze imininingwane emihle;
- i-matte kwesokunxele kusukela ekugcwaliseni kwangempela.
Kungakho ukususa unxande omhlophe ku-JPG kamuva kungabuyiseli ukusika kwangempela. Amaphikseli enguquko asevele exutshwe nokumhlophe.
Ukulondoloza i-JPG okuphindaphindiwe kungehlisa ikhwalithi
I-JPG isebenzisa ukucindezela okulahlekile. Iklanyelwe ukwenza izithombe zezithombe zibe zincane ngokwenza imininingwane ebonakalayo ibe lula. Ukonga ngakunye okungeziwe kungethula ukukhala okwengeziwe, ukuvinjwa, noma ukugcotshwa, ikakhulukazi emaphethelweni acijile anomehluko ophezulu.
Lawo ma-artifact anendaba emngceleni wokusika ngoba unqenqema yilapho kanye imininingwane ehlanzekile idingeka khona. Umthombo ocindezelwe kakhulu ungabonisa:
- ama-contours afiphele;
- amabhlogo amancane ombala eduze kohlaka;
- izintambo ezilahlekile noma izingxenye ezincane;
- Umsindo wombala ofana nemininingwane yangemuva.
Ukuthekelisa ku-PNG kuvimbela esinye isigaba esilahlekile se-JPG ngemva kokusika. Ayikwazi ukubuyisela imininingwane esivele ingekho emthonjeni, kodwa igwema ukungeza ukuminyaniswa kwe-JPG kumphumela osobala.
Uma i-JPG iseyifayela lokugcina elilungile
I-JPG ingaba ifomethi yokulethwa enengqondo uma konke lokhu kuyiqiniso:
- isizinda sokugcina silungiswa ngamabomu;
- ukungafihli akudingekile;
- isithombe ngokuyinhloko sinezithombe;
- indawo iyamukela noma ikhetha i-JPG;
- Usayizi omncane wokulethwa ubaluleke kakhulu kunezinguquko zangemuva ezizayo.
Isibonelo, isibhengezo esiqediwe esinesithombe sangemuva esigcwele singase singazuzi ku-alpha. Isithombe sekhathalogi esinengemuva elimhlophe esiqediwe singalethwa njenge-JPG uma ukucaciswa kokwamukela sikudinga.
Iphuzu elibalulekile inhloso. Gcwalisa okuyinhloko okukhanyelayo embaleni odingekayo, bese udala ikhophi yokulethwa kwe-JPG. Ungayilahli inkosi ngaphandle uma uqinisekile ukuthi isifundo ngeke sidinge esinye isizinda.
Ithebula lesinqumo elisebenzayo
| Udinga | Sebenzisa |
|---|---|
| Qala esithombeni sefoni noma sekhamera | I-JPG ingaba kuhle |
| Londoloza indawo engemuva engenalutho | PNG |
| Phinda usebenzise ukusika okukodwa emibaleni eminingi | Transparent PNG master |
| Letha isithombe sokugcina kungemuva elilodwa elingashintshi | I-JPG ingase ifaneleke |
| Londoloza iziphetho ezithambile ezibonisa ngale | PNG |
| Hlangana nendawo okuyiwa kuyo ecela ngokusobala i-JPG | Gcwalisa ngamabomu, bese uthekelisa i-JPG |
Ukuze uthole ukuqhathanisa okubanzi kwamafomethi okusika esimanje, funda okuthi PNG vs WebP vs AVIF ukuze uthole ukusikwa.
Amaphutha okubuyisela ajwayelekile
Ukuqamba kabusha isandiso
Ukushintsha okuthi image.jpg kube image.png akuliguquli ifayela noma kubuyisele i-alpha. Khipha noma uguqule ngesofthiwe ebhala ngempela idatha ye-PNG.
Isula okumhlophe ku-JPG eyisicaba
Lokhu kungasebenzela imidwebo ebukhali ebukhali, kodwa ngokuvamile kulimaza izingxenye ezimhlophe zesihloko futhi kushiye ukungcoliswa konqenqema oluphaphathekile. Ukubuyela enkosini ebonisa ngale kuphephe kakhudlwana.
Ithumela ukubuka kuqala esikhundleni sokuthekelisa
Isithombe-skrini sicaba konke ukubuka kuqala, okuhlanganisa noma iyiphi ibhodi yokuhlola ebonakalayo. Sebenzisa isenzo sokuthumela somhleli.
Kucatshangwa ukuthi yonke i-PNG isobala
I-PNG ingaphatha i-alpha, kodwa ingaqukatha ingemuva elikhanyayo ngokuphelele. Iqinisekise phezu kombala ohlukile.
Ukuhamba komsebenzi okuphephe kakhulu
Sebenzisa i-JPG kulokho ekwenza kahle: okokufaka kwezithombe okuvamile kanye nokulethwa kwengemuva eligxilile. Sebenzisa i-PNG lapho umphumela kufanele ulondoloze obala.
Gcina i-PNG master ehlanzekile ngemva kokususwa kwengemuva. Kusukela kulokho okuyinhloko, yenza i-JPG emhlophe, i-JPG enombala, noma enye ikhophi yendawo lapho kudingeka. Leli oda ligcina izinketho futhi ligwema ukuzama ukwakha kabusha ukubonisa ngale ngemva kokuba senziwe isicaba.