Want to create a map of pressure from image

Posted by DMItchell on May 25, 2010; 3:14am
URL: http://imagej.273.s1.nabble.com/Want-to-create-a-map-of-pressure-from-image-tp3688191.html

Hi all.

I have the following image:



For the processing I need to do on it, I need to divide it up into clearly demarcated sections that I can define a pressure for.

I was thinking of doing this by setting the intensity values in certain regions to 1, 2, 3,  or 4, then later in my postprocessing I can simply say something along the lines of: if intensity = 1, pressure = 1atm, etc.

i.e.:


Now, I can manually draw polygons and fill them with the desired intensity, but I'd prefer a way to use the lines dividing the section in the existing image. I was thinking perhaps smoothing the image somewhat then using edge detection, but I can't figure out how to then fill within the boundaries defined by the edge.


If anyone could direct me to a better way than simply drawing in and filling polygonal sections, I'd be most appreciative.

Best Regards

Daniel