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noise ratio

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    HuntedDragon
    8 Jul 2010 - 11:35 AM

    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
    Carabosse e2 Member 1139390 forum postsCarabosse vcard England269 Constructive Critique Points
    8 Jul 2010 - 11:42 AM

    Signal-to-noise ratio?

    cameracat
    cameracat  108578 forum posts Norfolk Island61 Constructive Critique Points
    8 Jul 2010 - 11:48 AM

    The DXO mark web page may help with all the figures.

    Wink

    HuntedDragon
    8 Jul 2010 - 12:14 PM

    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.

    ty

    HuntedDragon
    8 Jul 2010 - 12:19 PM

    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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