Draw normal to edge detection image

Hello,

        I have an image that is the resulting image after detecting an edges, now i have to draw normal vector to the surfaces of the image .

Answer 1

[Wolfgang Schwanghart]

You can compute surface normals using the function surfnorm. Then, you can use quiver to draw the vectors.

HTH, W.

[Mehri Mehrnia]

but surfnorm is for 3D , how to use it for the edges of the 2D shape?