MP Uncedisa Ukucacisa iNqanaba leKhamera
Njengoko ukhangele ukuthenga ikhamera yedijithali, enye yezona ziqhelo eziqhelekileyo zekhamera kwi-jargon ozozibona zikhutshwe ngabavelisi kwaye zivakaliswe ngabadayisi yi-megapixel. Kwaye yenza into enengqiqo - iindigapixels ezingakumbi ikhamera inokukunikela, bhetele kufanelekile. Kunene? Ngelishwa, yilapho izinto ziqala ukudideka. Qhubeka ufunda ukuphendula umbuzo: Yintoni i-megapixel?
Ukuchaza iPalamente
I-megapixel, esoloko ifutshane kwi-MP, ilingana ne-pixels eyi-1 yezigidi. I-pixel yinto ebalulekileyo yomfanekiso wedijithali. Inombolo yamagapixel igqiba isisombululo somfanekiso, kunye nomfanekiso wedijithali ngeegapixel ezininzi zinezigqibo ezininzi. Isisombululo esiphezulu ngokuqinisekileyo sinqweneleka kwiifoto zedijithali, njengoko ithetha ikhamera isebenzisa iipekseli ezininzi ukudala umfanekiso, omele uvumeleke ngokuchanekileyo ukuchaneka okukhulu.
Iinjongo zobuGcisa zeMegapixel
Kwikhamera yedijithali, isandi somfanekiso sigcina ifoto. Inzwa yesikrini yinkqubo yekhompyuter eyenza umlinganiselo wokukhanya ohamba nge-lens uze uhlasele i-chip.
Iimpawu zemifanekiso ziqulethe i-receptors encinci, ezibizwa ngokuba ngamaphikseli. Ngamnye wala ma-receptors unokulinganisa ukukhanya okubetha i-chip, ukubhalisa ubunzima bokukhanya. Inzwa yomfanekiso iqulethe izigidi zala ma-receptors, kwaye inani lamamkeli (okanye iipekseli) ligqiba inani lamagapixel ukuba ikhamera ikwazi ukurekhoda, ikwabizwa ngokuba yimali yesisombululo.
Ukuphepha ukudibanisa iPhalamende
Yilapho izinto zithatha into encinci. Nangona kuqiqa ukuba ikhamera eneegapixel ezingama-30 kufuneka ibe nekhwalithi engcono yomfanekiso kunekhamera engakwazi ukurekhoda i-megapixels ezingama-20 , akusoloko iimeko. Ubunzima bobukhulu bomnxeba wesithombe ludlala indima ebalulekileyo ekuqaliseni umgangatho womfanekiso wekhamera ethile.
Cinga ngako ngale ndlela. Inzwa enkulu yomfanekiso kwisayizi yomzimba equlethe i-20MP iya kuba nama-receptors aphezulu amakhulu kumntu, ngelixa isantya somfanekiso esincinane kwisayizi yomzimba equlethe i-30MP iya kuba ne-receptors encinane kakhulu.
I-receptor enkulu yokukhanya, okanye i-pixel, iya kukwazi ukulinganisa ngokuchanekileyo ukukhanya okungena kwi-lens ukusuka kwindawo ngaphandle kwesithotho esincinci sokukhanya. Ngenxa yezinto ezingalungileyo ekulinganiseni ukukhanya kunye ne-pixel encinci, uya kugqiba ngeephosiso ezininzi kwiimilinganiselo, okubangela "ingxolo" kumfanekiso. Izaziso ziipekseli ezingabonakali njengombala ochanekileyo kwisithombe.
Ukongezelela, xa iipikseli zomntu ngamnye zisondelene kunye, njengoko zinomfanekiso omncinane wesithombe, kunokwenzeka ukuba izibonakaliso zombane eziza kuphazamisana, zenza amaphutha kumlinganiselo wokukhanya.
Ngoko ngelixa inani lama-megapixels ikhamera linokurekhoda lidlala indima kumgangatho wezithombe, ubuninzi bomzimba wesikrini somfanekiso ludlala indima enkulu. Ngokomzekelo, i- Nikon D810 inama-megapixel angama-36 kwisisombululo, kodwa iphinda inike umfanekiso wesininzi kakhulu, ngoko ke unako konke okusemgangathweni kwezo zombini ihlabathi.
Ukutshintsha i-MP Izilungiselelo
Uninzi lweekhamera zedijithali zikunika ukhetho lokutshintsha inani lee-megapixel ezirekhodiweyo kwisithombe esithile. Ngoko ukuba isisombululo esiphezulu sekhamera ngu-20MP, unokwazi ukurekhoda imifanekiso e-12MP, 8MP, 6MP, ne-0.3MP.
Nangona ngokuqhelekileyo kungacetyiswa ukurekhoda iifoto ngee-megapixels ezimbalwa, ukuba ufuna ukuqinisekisa isithunzi segedijithi esiza kufuna i-limited amount of storage space, uya kudubula kwisimo se-megapixel esezantsi, njengoko urekhoda nenani elikhulu lee-megapixel okanye isisombululo esikhulu sifuna indawo engaphezulu yokugcina.