pakshapaat frame

digital photography mein, ack purvagrah frame ack opto-electronic chhavi samvedak seey praapt ack chhavi haye, jisamen koee vaastavik exposure samay naheen hotaa haye. iss prakaar praapt chhavi mein kewal electronics key kaaran avaanchhit sanket hotey hain joe samvedak detta koo vistrit karate hain, aur avesh sanchay seey avaanchhit sanket naheen (ee.jee. samvedak key bheetar hii dark current seey).
ack purvagrah frame ack gahare frame key poorak haye, jisamen ack avesh ekikaran samay hotaa haye lekin andhere mein.
choonki ack gahare frame mein ack nishchit-pattern shore ghatak sahit avaanchhit sanket hotaa haye, jisamen seey kuchh purvagrah frame seey mell khaate hain, aur jinamen seey kuchh gahare pravaah key kaaran hotaa haye aur exposure samay key samanupati hotaa haye, isaliye ack chhavi praapt karna sambhav haye joe kewal gahare-vartamaan ghatak kaa pratinidhitva kartaa haye. parinami chhavi ack "kritrim" dark frame praapt karane kii anumati detee haye jaba exposure samay key aadhar parr ack kaarak seey gunaa kiya jaataa haye aur phir bayas frame mein vaapas jodaa jaataa haye. haalaanki yeh takneek pratyek vishisht exposure avadhi key liye ack dark frame koo shoot karane kii tulanaa mein cumm sateek haye, lekin dark frame ghataav key liye dark-frame detta praapt karane key liye aavashyak samay koo kaafee cumm karane kaa laabh haye.

