classification of image edges in matlab

hi I have processed a picture and found the edges of it. the edges show 6 circles and now I wanna separate each circle from others. I mean that I need something like decision boundary to classify the circles and extract and process features of each circle separately. I have changed it to binary image .could you please help me?

Answer 1

[Image Analyst]

Try imfindcircles() on the original gray scale image.

http://www.mathworks.com/matlabcentral/fileexchange/38484-segmenttool--an-interactive-gui-for-segmenting-images/content/FindCirclesGUI.m

[forough j]

I have used imfindcircles () but it did not work because the radiuses of circles are large

[Image Analyst]

Please post the original gray scale image.