Kwilizwe lemifanekiso yedijithali, ngaba uke wazifumana uzibuza ukuba imele ntoni iJPEG? Ngayo yonke imigaqo ephaya yeentlobo zemifanekiso- i-GIF, i-TIFF, i-JPEG, i-PDF-kulula ukudideka. Qhubeka ufunda ukulungisa ezinye zeeyantlukwano ukuze uyeke ukuzibuza ukuba ijonge ntoni iJPEG.
IJPEG imele ntoni?
Isifinyezo
Isifinyezo sokwenene seJPEG simele iQela lamaNgcali abaFoti abaDibeneyo, eligama lombutho oqale wazisa ifom yedijithali ngo-1992.
Amanqaku afanelekileyo- Imifanekiso yeNostalgic yoMfanekiso
- Indlela yokuthatha imifanekiso engcono
- Imizekelo yePostrait yangaphandle
Yintoni iJPEG?
I-JPEG yenye yeentlobo ezininzi zokucinezelwa ezinokusetyenziselwa umfanekiso wedijithali. Umzekelo, xa ikhamera idala umfanekiso weJPEG, izama ukumela ngokuchanekileyo into ethathe ifoto yayo kweyona ndawo incinci yendawo. Iindidi zoxinzelelo ezahlukeneyo (ezinje ngee-GIFs) zokucinezela imifanekiso ngeendlela ezahlukeneyo kuneeJPEG.
Ngaba iJPEGs icinezela njani?
IiJPEGs zinyanzela imifanekiso ngenye yeendlela ezimbini ezahlukeneyo: ukulahleka okanye ukungena phakathi. Ukunyanzelwa kokulahleka kuthetha ukuba ezinye zeempawu zomgangatho ziya kulahleka kwinkqubo yokugcina. Rhoqo lo mahluko awufane ubonakale kwiliso lomntu (kuxhomekeke kwii-megapixels ezisetyenziswe emfanekisweni). Uxinzelelo lwe-JPEG yokulahleka yeyona nto ixhaphakileyo.
Ukunxibelelana kunqabile kodwa kuxhasa nayiphi na ilahleko enokubakho kumgangatho womfanekiso. Endaweni yoko, umfanekiso ugcinwe ngendlela oza kuthi uphuhle kancinci. Eyona ndlela yokucinga ngokuhamba phakathi kukucinga ngokulayisha umfanekiso kwiphepha lewebhu kancinci: uya kuthi chu ufumane inxenye kodwa ungabi nawo umfanekiso opheleleyo de ube ulayishwe ngokupheleleyo. Le fomu yeJPEGs eqhubekayo ayiqhelekanga kwaye kuhlala kunzima ukufumana izixhobo kunye nesoftware eya kuthi ixhase le fomu.
Enye into ekufuneka uyazi ngeeJPEG
Rhoqo xa kuthethwa ngee-JPEGs, omnye uya kubona unobumba u-Q, alandelwe luphawu olulinganayo kunye nelinye inani (njenge-Q = 75). Eli nani libhekisa kumgangatho womfanekiso ngokwawo. I-Q = 100 ingumgangatho opheleleyo womfanekiso, i-Q = 50 ngumgangatho womgangatho ophakathi kwaye u-Q = 1 ngowona mgangatho uphantsi. Amanani amakhulu (Q = 55 +) ahlala ethatha indawo enkulu yeefayile ngelixa amanani asezantsi (Q = 45 okanye ngaphantsi) zihlala zibonisa ukwehla okukhulu kumgangatho womfanekiso. Umgangatho ophantsi kwe-Q = 25 uhlala ubonakalisa inqanaba eliphezulu le-pixelation kwaye umfanekiso uthambekele ekubeni ugqwetheke ngokucacileyo. Kulula ukubona umahluko phakathi kweyona mifanekiso ilungileyo kunye neyona imbi kakhulu. Kumfanekiso wokuqala, amagama kunye nemvelaphi zicacile kwaye imibala ibukhali. Kumfanekiso wesibini, umgangatho osezantsi, amagama aba fuzzier kwaye kukho pixelation ecacileyo ngasemva.
| Q = 90 | Q = 10 |
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Zisetyenziselwa ntoni iiJPEG?
IiJEPG zihlala zisetyenziswa kwiikhamera ezininzi zedijithali ukuthatha imifanekiso ekumgangatho ophezulu. Le fom isebenza kakuhle ekubuyiseleni imifanekiso emikhulu. I-JPEG yeyona fomathi ifanelekileyo yokuma komhlaba, amahlumela endalo, umsebenzi womzobo kunye nayo nayiphi na into enjalo. Nangona kunjalo, ukwenza umsebenzi onenkcukacha ngakumbi-njengomsebenzi othile we-macro okanye amagama aneenkcukacha ezininzi (njengokuthatha umfanekiso wepleyiti kumfanekiso oqingqiweyo) -ifomathi yefayile ayiwusebenzisi owona mfanekiso mhle.
Kude kube nini upheka isitovu ehovini
Iinkonzo zeJPEGs
- Enye yeenzuzo ezinkulu zefomathi yeJPEG kukuba yamkelwe ngokuqhelekileyo. Ngokudibana nee-GIFs, iiJPEGs ziifomathi eziqhelekileyo zokulayisha iifoto kwi-Intanethi. Iikhamera ezininzi zedijithali ziya kuthatha imifanekiso yeJPEG ngokwendalo.
- IiJPEG zithatha umbala wetruer kunayo nayiphi na enye indlela yedijithali.
- Kulabo banezixhobo zokwenza njalo, iiJPEGs zineefom zoxinzelelo ezininzi (njengoko kuchaziwe apha ngasentla).
- IiJPEGs zinokucinezelwa ngakumbi kwikhompyuter ngaphandle kokubingelela kakhulu ngomgangatho womfanekiso.
Umxhasi weeJPEG
- Ukuba ucwangcisa ukufota uninzi lwemizobo, imigca okanye izifundo ezineenkcukacha ezininzi, iiJPEGs zinokwenza ukuba ezi zifundo zibonakale zilufifi ngaphandle kokuba ubungakanani befayile buphezulu kakhulu.
- I-JPEG ngamanye amaxesha azinakho ukubonisa umahluko kwimibala efanayo kakuhle. Unoko engqondweni, ifomathi ayisiyiyo eyona ifanelekileyo yokuthatha iifoto zezifundo ze-greyscale.
- Ukuba ucwangcisa ukwenza iiJPEG zakho zibonakale ngesoftware yokuhlela iifoto, kunokuba yinto engenakwenzeka.
- Imiphetho inokufiphala ngeefomathi zeJPEG.
