Re: Using log10 to analyse images

Posted by Michael Schmid on Mar 27, 2015; 12:52pm
URL: http://imagej.273.s1.nabble.com/Using-log10-to-analyse-images-tp5012205p5012207.html

Hi Godfrey,

when dividing images with Process>Image Calculator, make sure you check "32-bit result". Then use Process>Math>Log on the result, and divide (Process>Math>divide) by ln(10) = 2.302585093

Michael
________________________________________________________________
On Mar 27, 2015, at 13:34, Godfrey Pasirayi wrote:

> Dear members
>
> I am kindly writing to seek your assistance in analysingimages using the log10 function.  Forexample I have two images A and B. I would like to perform the operation  Log 10 ( A/B) in image J to get image C. When I perform this operation theresultant  image C is a black image with no features. Can someone in the group help me to dothis. I would like to see image C with all the features. My image A thebackground without the sample and Image B is the sample. So image C is theproduct only without the background contribution.
>
> Godfrey Pasirayi

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