(04-27-2018, 03:35 PM)toni-a Wrote: Never said BC was not correct, just I didn't get it, Xan someone explain that in a simple way I could understand?
well, to make it simple, take 4 times the same picture. Now, every pixel has a bit of noise. In dark areas, the light signal is so week, it's difficult to see what is the image and what is noise.
let's take a single pixel. It should have, for example, a grey value of 12 ideally, but with noise in one image it's 15, in another it's 11, then 9, last 13. Now you average the 4 pixels, the noise will be less because you average over 4 frames. So, totally, you decrease the noise in the image, which increases the DR, since you have now more good information in the dark regions.