Converting 8-bit Grey Scale

Posted by Sebastian Baumbach-2 on Aug 28, 2009; 5:53pm
URL: http://imagej.273.s1.nabble.com/Converting-8-bit-Grey-Scale-tp3691353.html

Hey All,

I have analyzed pressure sensitive film using imageJ.  I am using  
several processing steps and finally receive a 8-bit grey scale  
image.  I am analyzing the pressure using the grey values which I  
receive through the histogram tool embedded in ImageJ.  0 equals black  
and 2 white 55.

To make the correlation between grey values and pressure more  
apparent, I would like to have 0 equalling white and 255 black.  If I  
remember correctly, grey scale is linear function, which means that I  
should be able to simply subtract the received values by 255.

Is that correct?

Thank you very much in advance!

Sebastian