How can I extract the diameter of the circle in an RGB image in this particular case?

so I have about 1000 similar images (cant manually use imtools) and in each case, the diameter underneath is changing. What is a good approach to determine the diameter of the grey/blue circle? The red color in this particular case is the noise. Help me!

Gefragt:

am 24 Feb. 2018

Beantwortet:

am 24 Feb. 2018

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by