22/05/13I-Full Well Capacity inani lesiginali etholiwe engakwazi ukumumatha iphikseli ngalinye, okunquma isignali ekhanya kakhulu ikhamera engayithola ngaphambi kokuba kufinyelelwe ukugcwaliswa kwesikhala. Uma i-pixel igcwala ngenxa yokugcwalisa kahle i-pixel, ukushuba kwaleyo pixel akusaqoshwa ngokunembile. Umthamo ophezulu ogcwele ogcwele uyinzuzo ezinhlelweni ezidinga ububanzi obukhulu obuguqukayo.
Umfanekiso 1 ubonisa ubudlelwano phakathi komthamo ogcwele wemithombo kanye nobubanzi obuguqukayo. Umfanekiso 1A : Umthamo ophansi ogcwele womthombo wenza isithombe silahlekelwe ulwazi lwamasiginali akhanyayo. Umfanekiso 1B : Umthamo ophezulu ogcwele ogcwele wenza isithombe sithole ulwazi olugcwele kusuka kumasignali abuthakathaka kuya akhanyayo.
Uma ama-photon etholwa ngesikhathi sokuchayeka kwesithombe, akhulula ama-electron ngaphakathi kwe-silicon, abese egcinwa ku-pixel kahle kuze kufundwe. Iphikseli inenani eliphezulu lama-electron angagcinwa ngaphambi kokuba isitolo esingokoqobo sigcwale, noma inani lesithombe sedijithali se-greyscale lifinyelela umkhawulo. Ngokufanelekile, isikhathi sokuchayeka kanye namazinga okukhanya kufanele asethwe ngendlela yokuthi lokhu kungavunyelwa ukuthi kwenzeke. Kodwa-ke, ezimeni lapho kokubili amasignali aphezulu naphansi avela esithombeni esifanayo, ukusebenzisa izikhathi zokuchayeka eziphansi noma amaleveli okukhanya angaveza amasignali aphansi kakhulu ukuze angatholwa noma ukulinganisa ezingxenyeni ezimnyama zesithombe njengoba umsindo uphazamisa amasignali abuthakathaka. Umthamo womthombo ogcwele ophakeme uvumela izikhathi zokuchayeka ezinkulu noma amazinga okukhanya ukuze athole amasiginali afiphele, ngaphandle kokugcwalisa amasignali aphezulu. Ukuze uthole ulwazi olwengeziwe nge-Dynamic Range, bheka isigaba samagama esithi 'Dynamic Range'.
Uma usebenza ngokukhethekile ezimeni zokukhanya okuphansi, noma uma ububanzi obuguqukayo bungeyona into ekhathaza kakhulu emfanekisweni wakho, umthamo ogcwele womthombo uzodlala indima encane ekunqumeni amapharamitha akho ekhamera afanelekile. Amanye amakhamera anezinketho nezindlela eziningi zokufunda, anikeza izinga lozimele elihlukile, izici zomsindo, nomthamo ogcwele womthombo. Kulawa makhamera, ukuhwebelana kuvame ukukwenzeka lapho amazinga aphezulu ozimele wekhamera angafinyelelwa ukuze kuncishiswe umthamo ogcwele womthombo ofinyelelekayo, olungele izimo zesithombe ezisheshayo, zokukhanya okuphansi.
