Re: Need Help - comparing two images

Posted by Mark Hiner-2 on May 12, 2014; 2:06pm
URL: http://imagej.273.s1.nabble.com/Need-Help-comparing-two-images-tp5007684p5007701.html

Another option would be to use the image
calculator<http://rsbweb.nih.gov/ij/docs/guide/146-29.html#tab:ImgCalculator>and
use "difference" between the two images. This would create a result
image highlighting the portions of the images that differ. If it's hard to
tell visually, you can check a
histogram<http://rsbweb.nih.gov/ij/docs/guide/146-30.html#sub:Histogram>on
the result - if the two were equal, then after the calculation you
should get an image with all 0's.

- Mark


On Mon, May 12, 2014 at 6:50 AM, Richard VanMetter
<[hidden email]>wrote:

> Are both images exactly the same size? (i.e. width and height in pixels).
>
> If so, I have a plugin that will allow you to rapidly alternate between
> them in a single frame. I have found this to be a very powerful way to make
> very detailed comparisons of two images, peimarily because you can zoom and
> pan on both images simultaneously.
>
> Let me know.
>
> Rich
>
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