Kuyini Ukulungiswa Kwesithombe?
La ukulungiswa kwesithombe isho inani lemininingwane elingaqukatha isithombe sedijithali. Kukalwa ngo 'amaphikseli ngentshi ngayinye' (PPI) noma ku- 'amachashazi ngentshi ngayinye' (DPI) endabeni yezithombe eziphrintiwe. Isithombe esinokulungiswa okuphezulu sizoba namaphikseli engeziwe, ahumusha imininingwane eyengeziwe kanye nekhwalithi yesithombe ephezulu.
Ukulungiswa kwesithombe kubaluleke kakhulu uma kuziwa ekuphrinteni noma ekubukweni kuzikrini ezinkulu. Kulezi zimo, ukulungiswa okuphezulu kungenza umehluko phakathi kwesithombe esicijile, esicacile nesenziwe ngephikiseli futhi esingenamsebenzi.
Ukuqonda Amaphikseli
Iphikseli, okuwukufinyezwa "kwento yesithombe", iyunithi eyisisekelo yesithombe sedijithali. Iphikseli ngalinye liqukethe izingxenye ezintathu - ezibomvu, eziluhlaza okotshani neziluhlaza okwesibhakabhaka - ezingakwazi ukukhiqiza kabusha noma yimuphi umbala ngalokho okubizwa ngokuthi i-additive mixing.
- Isithombe sokucaca okuphansi: Uma isithombe sinokucaca okuphansi (okungukuthi, amaphikseli ambalwa), imininingwane yesithombe iyalahleka, okuholela esithombeni esifiphele noma esinephikseli.
- Isithombe sokucaca okuphezulu: Isithombe esinokulungiswa okuphezulu (esinamaphikseli engeziwe) singabonisa imininingwane eminingi, okuholela esithombeni esicacile, esibukhali.
Ukulungiswa Kuyithinta Kanjani Ikhwalithi Yesithombe?
Inombolo yamaphikseli isithombe esiwaqukethe inquma ukulungiswa kwaso, ngakho-ke, ikhwalithi ecatshangwayo yesithombe. Uma isithombe esinokulungiswa okuphansi sinwetshwa (isibonelo, ukuze siphrintwe noma siboniswe esikrinini esikhulu), amaphikseli 'ayeluliwe', okungaholela ekubukekeni kwephikiselite noma okufiphele.
Kubalulekile ukukhumbula ukuthi nakuba ungakwazi ukunciphisa usayizi wesithombe sokucaca okuphezulu ngaphandle kokuthinta kabi ikhwalithi yaso, inqubo yokuhlehla ayinakwenzeka. Okusho ukuthi, awukwazi ukwandisa ukulungiswa kwesithombe esinokulungiswa okuphansi ngaphandle kokululaza ikhwalithi yesithombe.
Ukulungiswa Kwesithombe kanye Nomhlaba Wedijithali
Emhlabeni wedijithali, ukulungiswa kwesithombe kubalulekile emikhakheni ehlukene: ukwakheka kwezithombe, ukuthwebula izithombe kwedijithali, kanye newebhu. Ekwakhiweni kwesithombe nokuthwebula kwedijithali, ukulungiswa okuphezulu kuvumela ukuhlelwa kwesithombe okunembe kakhudlwana nokunemininingwane.
Ngokwewebhu, ukulungiswa okwanele kuqinisekisa ukuboniswa okuphelele kwesithombe kumadivayisi ahlukahlukene. Lapha umqondo we "izithombe eziphendulayo", okubhekisela ezithombeni ezivumelana nosayizi nokulungiswa kwedivayisi yokubonisa.
Ukulungiselela Izithombe Zewebhu
Umgomo wokuthuthukisa isithombe sewebhu ukugcina ibhalansi phakathi kokulungiswa okuphezulu kwekhwalithi yesithombe ephelele kanye nosayizi wefayela omncane ukuvumela ukulayishwa kwekhasi ngokushesha.
- Ukwehliswa kosayizi wefayela: Amathuluzi okucindezela isithombe angasiza ekunciphiseni usayizi wefayela ngaphandle kokwehlisa izinga lesithombe esizwakalayo.
- Ukushintsha usayizi wesithombe: Ukushintsha usayizi wesithombe ube usayizi oqondile ozodingeka kuwebhusayithi nakho kungasiza ekugcineni usayizi wefayela omncane kanye nesikhathi sokulayisha ngokushesha.
Ngalo mqondo, ukuqonda ukulungiswa kwesithombe kuwusizo kakhulu kokubili ukuqinisekisa ulwazi oluhle lomsebenzisi lapho uphequlula ikhasi kanye nokuheha izivakashi eziningi ngezinga elingcono ezinjinini zokusesha.
Ngakho-ke, singene sijule emibonweni eyisisekelo yokuxazulula izithombe endaweni yedijithali, sicabangela amathuluzi nezimiso eziwusizo ekwelapheni nasekusetshenzisweni kahle kwezithombe zedijithali.
