Re: backgrounds

Posted by David Webster on Nov 10, 2009; 11:29pm
URL: http://imagej.273.s1.nabble.com/backgrounds-tp3690498p3690499.html

Bill,

I think landini's threshold color plugin will solve your first problem.
Select RGB mode, the set each band to "stop". This trhresholds out eveything
above a level. You do this for each band. Landini's plugin's can be found
via ImageJ's web page Plugins/Links to External Sites/Gabriel Landini.

David Webster

On Mon, Nov 9, 2009 at 11:31 AM, Rothman, William <
[hidden email]> wrote:

> Hello,
>
> I acquire RGB images on which I must substract those pixels with RGB
> values greater than (240,225,185).for example, ("background") and  set
> them to (0,0,0) BUT leave other pixels (with my information) alone. I
> guess I could write a macro, but was wondering if someone (most likely)
> has done this already.
>
>  I also want to increase the intensity of the dimmer untouched pixels
> (intensify the low intensity pixels)  in some non-linear fashion, maybe
> log scale.
>
> Any feedback welcomed.
>
> Thanks,
> Bill
>