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Averaging N images should (roughly?) make the noise go down by sqrt(N), so long as you don't introduce more sources of noise during collection. So the camera wo
by gugagore 7y ago
Averaging N images should (roughly?) make the noise go down by sqrt(N), so long as you don't introduce more sources of noise during collection. So the camera would have to be still, or the images registered to a common perspective.
- londons_explore 7y agoThe camera or subject can move, and as long as the movements are known then the reconstruction is still perfect. High end mobile phone cameras take hundreds of shots over a second or more to reduce noise, and rely on the fact they can estimate movement of things in the frame with optical flow and a gyroscope.
- gugagore 7y agoThis is what I meant by "registration", for the case when the subject isn't changing.