Re: Eastimation signal to noise ratio on imageJ

Posted by anusuya pal on Oct 22, 2017; 4:05pm
URL: http://imagej.273.s1.nabble.com/Eastimation-signal-to-noise-ratio-on-imageJ-tp5019580p5019581.html

Hello,

May I know what do u mean by binning? Is the whole image is divided into
16segments (4x4) ? And then, all the 16 segments are stitched to get the
whole image ( which you are calling unbinned)?

Thanks
Anu

On 22-Oct-2017 11:29 AM, "thpnick688" <[hidden email]> wrote:

> Hi, everyone,
>      I have encountered a question on estimating signal to noise ratio on
> imageJ. I have an image with 4x4 binning. The binning is done by the CCD
> detector not by the software. I use the ROI to measure the mean gray level
> intensity on the main object in the image. I also use the same size ROI on
> the background to measure the background noise. I use the simple equation
> "S/N= “mean gray level intensity in subject” / “mean gray level intensity
> of
> the noise”" to estimate the signal to noise ratio. However, by comparing
> with an image that is unbinned, I didn't see the SNR is improved after the
> calculation. So, what mistakes did I make?
>
> RL
>
>
>
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>
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