Ukuqonda iiPixi zeDiskhi kwi-Photography
Ukuba ubheka kwiinkcukacha zekhamera yedijithali uza kuphawula izihlomelo ezimbini kwi-pixel count: esebenzayo kunye nangokoqobo (okanye iyonke).
Kutheni kubakho amanani amabini kwaye bathetha ntoni? Impendulo yalo mbuzo inzima kwaye ifumana ubugcisa obuhle, ngoko makhe sijonge nganye.
Ziziphi iipilisi ezisebenzayo?
Izixhobo zesithombe zekhamera zedijithali ezinamanani eepekseli, eziqokelela iiphoton (iipokotshini zamandla okukhanya). I-photodiode ke iguqula i-photons ibe yintlawulo yombane. I-pixel nganye ine-photodiode eyodwa kuphela.
Iipekseli eziphumelelayo ziipekseli ezithatha imifanekiso yedatha. Ziyimpumelelo kunye nencazelo, iindlela ezisebenzayo "eziphumelele ekuveliseni umphumo oyifunayo okanye umphumo ojoliswe kuwo." Lezi iipekseli ezenza umsebenzi wokubamba umfanekiso.
I-sensor eqhelekileyo kuyo, umzekelo, i-12MP ( megapixel ) ikhamera inenani elilinganayo lamaphikseli asebenzayo (11.9MP). Ngako oko, iipekseli ezisebenzayo zibhekisela kummandla wesikhombisi ukuba iipekseli 'zokusebenza' zifihla.
Ngezinye izihlandlo, kungekhona zonke iipekseli zentloko ezingasetyenziswa (umzekelo, ukuba i-lens ayikwazi ukumboza uluhlu lwentsimbi yonke).
Ziziphi ii-Pixels zangempela?
Inani langempela, okanye lilonke, i-pixel count of sensor yekhamera ibandakanya ukuba (malunga) 0.1% yeephikseli ezishiywe emva kokubala iipikseli ezifanelekileyo. Zisetyenziselwa ukuqonda imida yomfanekiso kunye nokubonelela ngolwazi lombala.
Amaphikseli aseleyo asele umgca wesikrini somfanekiso kwaye akhuselwe ekufumaneni ukukhanya kodwa asetyenziswa njengendawo yokubhekisa enganceda ekunciphiseni ingxolo. Bafumana isignali esichazela inzwa ukuba i-'mnyama 'yangoku iyakhiwe ngexesha lokuchazwa kwaye ikhamera ihlawulisa oko ngokulungisa ixabiso leepekseli ezifanelekileyo.
Oko kuthetha ukuthini kuwe ukuba ukutshatyalaliswa kwexesha elide, njengalezo ezithathwe ebusuku, kufuneka kube nokunciphisa ubuninzi besandi kwingingqi emnyama emininzi yomfanekiso. Kwakukho umsebenzi ophezulu we-thermal ngexesha i-shutter ye-camera shutter evulekile, eyabangela ukuba iipikseli ezinqamlekileyo zisebenze, zitsho i-sensor yekhamera ukuba kukho indawo eninzi yezithambile ukuba ixhalabele kuyo.
Ziziphi ii Pixels eziPhakathi?
Enye into yokukhathazeka ngeenjini zekhamera kukuba ezinye iikhamera ziyakwazi ukuchankanya inani leenjini zeepekseli.
Ngokomzekelo, ikhamera ye-6MP inakho ukuvelisa imifanekiso engu-12MP. Kule meko, ikhamera ineza ii-pixels ezitsha kwii-megapixels ezi-6 zithathwe ukudala i-megapixels ezili-12 zolwazi.
Ubukhulu befayili bonyuka kwaye oku kubangela umfanekiso ogqithiseleyo kunokuba ufanele udibanise kwisofthiwe yokuhlela umfanekiso ngoba ukudibanisa kwenziwa phambi kokunciphisa iJPG.
Nangona kunjalo, kusoloko kubalulekile ukukhumbula ukuba ukudibanisa akukwazi ukudala idatha engazange ifakwe kwindawo yokuqala. Umehluko kumgangatho xa usebenzise ukuchaneka kwikhamera kusemgangathweni.