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noise ratio

HuntedDragon 9 118 United Kingdom
8 Jul 2010 11:35AM
hi all, just having a ponder on noise, there must be some statistical eveluation figure, some thing like a ratio of pixal, e.g. 20 percent noise pixals to 80 percent actual image?

whats it proper name etc? does any one know?

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Carabosse 15 41.1k 270 England
8 Jul 2010 11:42AM
Signal-to-noise ratio?
cameracat 14 8.6k 61 Norfolk Island
8 Jul 2010 11:48AM
HuntedDragon 9 118 United Kingdom
8 Jul 2010 12:14PM
that's pritty much it.. http://en.wikipedia.org/wiki/Signal_to_noise_ratio_%28imaging%29

i was thinking a more simplistic, sort of a 15meg image you'll get about 1 meg of actual pixal loss... same but diferent.

HuntedDragon 9 118 United Kingdom
8 Jul 2010 12:19PM
in working out ariel Db's the figures progect all sorts of silly hi good signals, say a factor '12' to '25', in reality you get a max of 3Db gain.. this is the maximum acheivable and figures of 2.5 ar hi...(as an exsample figure set).

is there a similar on the camera image, as in a reality figure...hense the actual pixal noise equivilent.....

dark current..quisent...black noise etc etc etc, all diferent but the same in the end product, ie. noise.

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