How to transform irregular-shaped region into an equivalent circle

Hi;

I am trying to transform irregular shaped regions in an image into an equivalent circle. How can I do so?

I need this for further analysis of the images and this is just an intermediate yet crucial step.

Thanks;

[Matt J]

How is the "equivalence" defined?

Answer 1

[Image Analyst]

Not sure what that means. But you can use regionprops() in the Image Processing Toolbox to get the Area, Perimeter, and Equivalent Circular Diameter. See my Image Segmentation Tutorial for a demo. Then you can use rectangle to plot a circle in the overlay, or use the FAQ to make a circle in an image: http://matlab.wikia.com/wiki/FAQ#How_do_I_create_a_circle.3F