Threshold

Posted by Paul Stutzman on Aug 26, 2005; 3:58pm
URL: http://imagej.273.s1.nabble.com/Threshold-tp3704976.html

I am having difficulty creating binary images using the Threshold  
that is called from Image-Adjust.   I want to generate a binary where  
the feature of interest is gray 255 and the remainder is 0. I used  
the picker to set the gray value to 255 and use the scroll bars to  
set upper and lower bounds.  Interestingly, I still see low count  
noise even after the lower bound is set well above the noise gray  
levels.  Next, when attempting to create the binary, a window  
detailing options "Apply LUT' appears where I de-select the option  
for black foreground, white background.  The resulting window is a  
uniform level (62 in todays attempt) using the red option; using the  
black and white option in another attempt results in a uniformly gray  
image, again at level 62.  Another attempt using the Black-White  
option and picker set to 255 resulted in the entire image being set  
to 255.  I am using ImageJ 1.34S on a G5.


Paul Stutzman