pixel measurment

Posted by Reena Prity Murmu on Aug 22, 2011; 2:05pm
URL: http://imagej.273.s1.nabble.com/pixel-measurment-tp3683348.html

Hi,
I want to compare differences in pixel proportions between 2 images.  
Can anyone tell me how to do that? how to measure pixels in a given  
image?
many thanks

Best
Reena