How to create a mask

Hi

I am trying to create a mask for an image which has multiple circles in it. I have tried using filledCircle function. But it only adds the circle to the figure, and does not change the image itself.

I there any other way I can create the masks given the centers and the radii of the circles?

Answer 1

[Image Analyst]

You can use the FAQ - it creates a circle that can be used as a mask. http://matlab.wikia.com/wiki/FAQ#How_do_I_create_a_circle.3F

Also, see my attached demos.