Set image roi to zero

Hi,

I have an image 800 x 800. I want to set a 10 x 10 region at center 200,200 to ZERO. How do i do that ? Help thanks

Managed to do it. Thanks

[conor paxton]

Hello, Could I ask, how you managed to do it please?

Answer 1

[Guillaume]

A 10x10 region can't be centered on a pixel. It needs to have an odd size.

Anyway:

yourimage(196:205, 196:205, :) = 0

Answer 2

[David Sanchez]

If I is your image

I(201:210,201:210) = 0;

[Guillaume]

That's hardly centered on 200,200 !

And that only works with grayscale images