Uma kuziwa ekusebenzeni nge amafayela wesithombe Kukhompyutha yethu, sinenani elikhulu lamafomethi esinawo, wonke anezinzuzo zawo kanye nokubi. Okubili kwaziwa kakhulu amafomethi e-JPG ne-JPEG. Eqinisweni, yizona ezimbili ezisetshenziswa kakhulu. Yingakho umbuzo abasebenzisi abaningi abazibuza wona uthi: Yikuphi okungcono kakhulu? Uyini umehluko phakathi kwe-JPG ne-JPEG?
Akudingekile ukuthi uqaphe kakhulu ukuze uqaphele ukuthi amagama e-JPG ne-JPEG afana kakhulu. Iqiniso liwukuthi abantu abaningi bayabadida futhi bacabange ukuthi bayafana. Futhi azihambi kabi, njengoba, eqinisweni, kokubili i-JPG ne-JPEG kuyizandiso ezimbili zefayela ezibhekisela kufomethi efanayo yesithombe sedijithali. Sichaza ngezansi:
Indaba ye-nomenclature
I-JPEG is the acronym for Joyina iqembu Lezingcweti Zezithombe Ezihlanganayo, umdali weqembu lezobuchwepheshe wefomethi yegama elifanayo elisetshenziswa kakhulu kumakhamera edijithali, ezinkundleni zokuxhumana nakwezinye izindawo.
Kodwa-ke, lapho le fomethi ikhishwa, emuva ngo-1992, cishe wonke amakhompyutha ayesebenzisa uhlelo lokusebenza lwe-Microsoft lwe-MS-DOS. Kusukela lolu hlelo asekelwa kuphela izandiso zefayela ezinezinhlamvu ezintathu, isandiso se-JPEG bekufanele sifushaniswe nakanjani ukuze sibe yi-JPG. Futhi yile ndlela okwadluliselwa ngayo kamuva ezinguqulweni zokuqala zeWindows.
Ngakolunye uhlangothi, isandiso se-.jpeg asizange sibangele noma yikuphi ukungqubuzana kumakhompyutha we-MacOS, aqhubeka nokuyisebenzisa ngaphandle kwenkinga. Ngale ndlela sifika ezinsukwini zethu, lapho Kokubili amadivayisi we-Windows ne-Apple abona futhi asebenzise amafayela e-JPG ne-JPEG cishe ngokushintshana.
Ngakho-ke, kungacatshangwa kukho konke lokhu ukuthi umehluko phakathi kwalezi zakhiwo ezimbili uyindaba nje yegama lamagama. Akukho okudlula lokho.
Guqula i-JPG ibe yi-JPEG futhi ngokuphambene nalokho
Njengoba umehluko phakathi kwe-JPG ne-JPEG usesimweni futhi ungekho engqikithini, uma usebenzisa ifomethi eyodwa noma enye awukho umehluko.
Isibonelo, uma ufuna ukwenza ukuguqulwa kwefomethi kanye Guqula isithombe sisuke ku-JPG siye ku-JPEG, sithola isimanga: akudingeki wenze noma yini! Okufanayo kuzokwenzeka lapho uzama ukwenza umsebenzi ngakolunye uhlangothi.
Ngezizathu ezifanayo, noma yiluphi uhlelo lokuhlela isithombe luzovula futhi luphathe amafayela ngesandiso se-.jpeg esifana ncamashi nalawo anesandiso se-.jpg. Uzobathatha njengabalinganayo, ngokuyisisekelo ngoba banjalo.
I-JPG noma i-JPEG: Ikuphi okungcono?
Uma sicabangela ukuthi kokubili i-JPG ne-JPEG izindlela ezimbili ezihlukene zokuqamba uhlobo olufanayo lwamafayela, umbuzo wokuthi yikuphi okungcono "ulahlekelwa yonke incazelo.
Uma sikhuluma ngobubanzi, kungashiwo ukuthi kunjalo izithombe ze-raster 24 kancane (ama-bitmaps esithombe), avame ukuba nokusetshenziswa okufanayo futhi alahlekelwe amaphesenti athile wekhwalithi lapho elondolozwa. Lawa mafayela alondoloza izithombe ezakhiwe nge-RGB (Okubomvu, Okuluhlaza, Okuluhlaza okwesibhakabhaka) abangamela kuzo kuze kube nemibala eyizigidi ezingu-16. Akungabazeki ukuthi iyifomethi (noma amafomethi) anemibala emihle kakhulu futhi elungele ukusetshenziswa ezithombeni.
Ukusetshenziswa okungaqondakali kwe-JPG noma i-JPEG kunconywa ochwepheshe ukuze babonise izithombe kuwebhu ngaphandle kokuthatha isikhala esiningi kuseva yethu. Into esebenzayo ngempela. Lapho ulondoloza izithombe, ulwazi olungabalulekile kangako luyalahlwa, okwenza ifayela libe phakathi kuka-50% no-75% ngaphansi.
Ngaleso sizathu, kokubili i-JPG ne-JPEG kuyacatshangelwa amafomethi okucindezela alahlekile. Kuleli phuzu ngokusobala angaphansi kwamanye amafomethi afana ne-BMP, lapho kungekho ukulahlekelwa kwekhwalithi yesithombe. Uma esikufunayo kuwukunciphisa lokhu kusilela, enye indlela enhle ukusebenza ngamafayela e-RAW JPEG. Ngayo, sizokwazi ukukhetha izinto ezihlelekayo ngaphambi kokulondoloza inguqulo yokugcina.