Sub-Pixel Edge detection plugin?

Hello to all,
I am doing an intensive project over the next couple weeks that is concerned
with computer vision dimensional guaging. I was planning to use ImageJ for
the image editing software as there are possibilities of needing to write a
plugin to gather and store data about a picture. 

But what I really need is a plugin that can find edges to a sub-pixel
standard. All I will be doing is finding the diameter of a circular object
to a sub-pixel standard. Does any one knnow of a plugin that does this. I
would gladly make one but this is an area that I know little about and dont
have time to do a lot of background learning. So if anyone could even let me
know the steps in the procedure of sub-pixel edge detection and the names of
some algorithms or processes used for them it would be a tremendous help, I
have searched the internet thouroughly and there are no real clear
insrtuctions for what I'm doing that doesnt cost money. I am sorry to bother
you all but time is really an issue so if anyone could give me a shove in
the right direction I would be most grateful.
Thank you for you time, and I wish you all luck on your current work
projects.

Calvin Slope
--
View this message in context: 
http://www.nabble.com/Sub-Pixel-Edge-detection-plugin--t1356294.html#a3631519
Sent from the ImageJ forum at Nabble.com.