tube diameter

Posted by Paxton Provitera on Aug 08, 2007; 8:46pm
URL: http://imagej.273.s1.nabble.com/tube-diameter-tp3698688.html

Hi.
I have images that I have thresholded and then run through
Process>Binary>Distance Map.

The images are of tubes in which I would like to extract the radius value
(or the largest and center value given by the distance map).

The images vary in size but are mostly 640x480.
From the following example pixel values I want to extract only the value of
6:


Sample pixel values from a distance map image:

0 0 0 0 0 0 1 2 3 4 5 6 6 5 4 3 2 1 0 0 0 0 0
0 0 0 0 0 1 2 3 4 5 6 6 5 4 3 2 1 0 0 0 0 0 0
0 0 0 0 0 0 1 2 3 4 5 6 6 5 4 3 2 1 0 0 0 0 0
0 0 0 0 0 0 0 1 2 3 4 5 6 6 5 4 3 2 1 0 0 0 0
0 0 0 0 0 0 0 0 1 2 3 4 5 6 6 5 4 3 2 1 0 0 0

I've been stuck on some algorithm to extract the relevant information.
Thanks for any help on this.

-Paxton