How to have a contour with 4-connectivity?

Dear all,

I have a contour that shown below. Two of the corners are with 8-connectivity. Is there a way to make all the corners satisfy 4-connectivity?

Best,

Meshoo

Answer 1

[Meghana Dinesh]

Fill the image ( imfill). Use bwboundaries with conn = 4.

[Meshooo]

I was thinking if there is a direct way to restore those missing pixels. Thank you.