Usizo lwe-MP Lunganisa izinga lekhamela
Njengoba ubheke ukuthenga ikhamera yedijithali, enye yezingcezu ezivamile kakhulu zekhamera uzozibona zenziwe ngabakhiqizi futhi zivezwe ngabathengisi yi-megapixel. Futhi yenza umqondo othile - ama-megapixels angaphezulu ikhamera angayinikeza, kungcono kube kufanele. Kulungile? Ngeshwa, yilapho izinto ziqala ukudideka. Qhubeka ufunda ukuphendula umbuzo: Iyini i-megapixel?
Ukuchaza iPhalamende
I-megapixel, evamise ukufushaniswa ku-MP, ilingana namaphikseli ayizigidi ezingu-1. I-pixel iyisici somuntu ngamunye wesithombe sedijithali. Inombolo yama-megapixels inquma ukuxazulula isithombe, futhi isithombe sedijithali esinama-megapixel amaningi sinezixazululo eziningi. Isixazululo esiphezulu ngokuqinisekile sinesifiso esithombeni sedijithali, njengoba kusho ikhamera isebenzisa amaphikseli amaningi ukwakha isithombe, okuyinto okufanele ivumeleke ngokunemba okukhulu.
Izici Zezobuchwepheshe Zama-Megapixel
Khamera yedijithali, inzwa yesithombe irekhoda isithombe. I-sensor yesithombe yinsimu yekhompyutha ekala inani lokukhanya elihamba phakathi kwe-lense bese lishaya i-chip.
Izinzwa zithombe ziqukethe ama-receptors amancane, abizwa ngokuthi amaphikseli. Ngamunye walawa ma-receipt angakwazi ukukala ukukhanya okushaya i-chip, ukubhalisa amandla okukhanya. Inzwa yesithombe iqukethe izigidi zalezi zamukeli, futhi inombolo ye-receptors (noma amaphikseli) inquma inani lama-megapixels ikhamera elikwazi ukurekhoda, futhi libizwa ngokuthi inani lokuxazulula.
Ukugwema ukudideka kwe-MP
Yilapho izinto zithola kancane okukhohlisayo. Ngenkathi kufaka isizathu sokuthi ikhamera enezingama-megapixel ezingama-30 kufanele ihambise ikhwalithi yesithombe engcono kunekhamera engakwazi ukurekhoda ama-megapixel angu-20 , akuyona into njalo. Ubukhulu obungokwenyama yesisindo sesithombe ludlala indima ebaluleke kakhulu ekunqumeni ikhwalithi yesithombe yekhamera ethile.
Cabanga ngakho ngale ndlela. Inzwa enkulu yesithombe ngobukhulu obungokwenyama obuqukethe i-20MP izoba nama-receptors amancane okukhanya ngaphezulu, kuyilapho isisitho sithombe esincane ngobukhulu obungokwenyama esine-30MP sinomtholampilo omncane kakhulu wezimpendulo.
I-receptor enkulu yokukhanya, noma i-pixel, izokwazi ukulinganisa ngokunembile ukukhanya okungena ku-lens ukusuka kwesikhala kunombukeli omncane wokukhanya. Ngenxa yokungalungi kokulinganisa ukukhanya nge-pixel encane, uzophelela ngamaphutha amaningi ngezilinganiso, okuholela "kumsindo" esithombeni. Umsindo kukhona amaphikseli angabonakali njengombala oqondile esithombeni.
Ukwengeza, uma amaphikseli athile asondelene ndawonye, njengoba anesisindo esincane sesithombe, kungenzeka ukuthi izimpawu zombane ezikhiqizwa ngamaphikseli zingaphazamisana, kubangele amaphutha ekulinganisweni kokukhanya.
Ngakho-ke ngenkathi inani lama-megapixels ikhamera ingaqopha lidlala indima ekukhwalweni kwesithombe, usayizi wesimo senzwa yesithombe idlala indima enkulu. Isibonelo, i- Nikon D810 inama-megapixels angama-36 wokuxazulula, kodwa futhi inikeza inzwa enkulu kakhulu yesithombe, ngakho-ke inakho konke okuhle kokubili kwezwe.
Ukushintsha izilungiselelo ze-MP
Amakhamera amaningi edijithali akunika ithuba lokushintsha inani lama-megapixels abhalwe esithombeni esithile. Ngakho uma isinqumo esiphezulu sekhamera singama-20MP, ungakwazi ukurekhoda izithombe eziyi-12MP, 8MP, 6MP, ne-0.3MP.
Nakuba ngokuvamile kungavunyelwe ukurekhoda izithombe ngama-megapixel amancane, uma ufuna ukuqinisekisa isithombe se-digital esizodinga isikhala esincane esikhaleni sesitoreji, uzodubula esimweni esingaphansi se-megapixel, njengokurekhoda nenani elikhulu lama-megapixel noma Isixazululo esikhulu sidinga isikhala esiningi sokugcina.