Olympus-OM
[Top] [All Lists]

Re: [OM] Recommendations for compact digital camera

Subject: Re: [OM] Recommendations for compact digital camera
From: WayneS <om3ti@xxxxxxxx>
Date: Tue, 18 Nov 2008 07:05:31 -0500
At 05:53 AM 11/18/2008, Chuck  wrote:
>Are any of these high pixel count cameras able to deliver a quieter 
>image by combining pixels when used at lower resolution settings?
>
>For that matter, does down-sampling a noisy image in PhotoShop result in 
>a quieter image?  I've never noticed but I don't have particularly noisy 
>cameras.

The theoretical noise reduction for random noise goes at the rate of
1/sqrt(N) where N is the number of samples. So, down sampling at
a rate of 1/4 should cut the noise in half.

The only way it can get better than this is if the noise is correlated in
some way.

Wayne



-- 
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/

<Prev in Thread] Current Thread [Next in Thread>
Sponsored by Tako
Impressum | Datenschutz