Reducing image by summing

[Samuel GRANJEAUD]

Hello !

I would like to reduce image by summing the pixel values (or averaging).
For example a reduction by a factor of 3 should reduce a 3x3 pixels
square to 1 pixel whose value is the sum of the 9 pixel values. But I am
interested in the exact value of the pixels (in a quantitation view), so
the operation should be a sum (or an average). Does anybody knows a
plugin or macro to do that or something similar ? I don't want to use
the size or scale operations since I want to keep it quantitative.

Best regards,
--Samuel

[Wayne Rasband]

The "Averaging Reducer" plugin at
<http://rsb.info.nih.gov/ij/plugins/reducer.html> does this.

-wayne

On Jul 19, 2007, at 4:23 AM, Samuel GRANJEAUD - IR/IFR137 wrote:

> Hello !
>
> I would like to reduce image by summing the pixel values (or
> averaging). For example a reduction by a factor of 3 should reduce a
> 3x3 pixels square to 1 pixel whose value is the sum of the 9 pixel
> values. But I am interested in the exact value of the pixels (in a
> quantitation view), so the operation should be a sum (or an average).
> Does anybody knows a plugin or macro to do that or something similar ?
> I don't want to use the size or scale operations since I want to keep
> it quantitative.
>
> Best regards,
> --Samuel
>