How to remove small circles from edge detected image?

I have an image on which I have applied edge detection.

The image, however, has small circles which I would like to remove. I have highlighted some in red below:

How could I do this?

Answer 1

[Johan C]

Try imfill

https://ch.mathworks.com/help/images/ref/imfill.html

Have not used it my self, but i would start there.