Posted by
Alan Hewat on
Aug 13, 2009; 8:15am
URL: http://imagej.273.s1.nabble.com/Blending-overlapping-images-WITHOUT-blending-the-background-in-too-tp3691487p3691489.html
Thanks again Christophe. But my images do not contain distinct objects
but are 8-bit; it it is difficult to define a specific threshold. The
best result I got was to use paste control MAX, which is not an
average of course, but at least it ensures that no bright features in
either image are missed.
Frankly, I can't see the point of the paste control BLEND if it also
blends in a black (or white) background, and indeed none of the macro
examples use it AFAICS.
Alan.
2009/8/13 Christophe CHAMOT <
[hidden email]>:
> Mmmmh,
>
> I was a bit too fast for responding. If you want to average objects without
> average the background, not only paste non-zero pixels, the simpliest way is
> to extract the objects.
>
> If img1 is the destination image and img2 the image to be blended, I will
> threshold my objects (Image>Adjust>Threshold) in img2, then create a
> selection (Edit>Selection>create selection) then copy/paste these img2
> objects on img1 in blend mode.
>
> Other ways to proceed are welcome ...
>
>
> Alan Hewat a écrit :
>>
>> I want to blend together two overlapping (monochrome) images so that the
>> overlapping parts are their average intensities.
>>
>> But if I paste these images with paste control "blend" into a new
>> image with a black (or white) background, the background is blended in
>> too.
>>
>> Is their a paste mode that will not also blend in the black background
>> ? Or can I set the background to something that won't be blended in
>> when I paste onto it ?
>>
>> Alan.
>> ______________________________________________
>> Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE
>> <
[hidden email]> +33.476.98.41.68
>>
http://www.NeutronOptics.com/hewat>> ______________________________________________
>>
>
> --
> Christophe CHAMOT
> Responsable Technique PLATIM
> IFR128 BioSciences Lyon-Gerland
> 04.72.72.87.62
> www.ifr128.prd.fr/PLATIM
>
--
______________________________________________
Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE
<
[hidden email]> +33.476.98.41.68
http://www.NeutronOptics.com/hewat______________________________________________