draw the missing internal side of points cloud of jug profile

Hello,

I have a profile of jug as points cloud.

The profile doesn't contain the internal side of the profile and I want to complete it.

The thickness of the jug should be equal to the thickness of the rim, and the internal side shouldn't be affected by the base or the handle.

does anyone have an idea?

Thanks!

load jug.mat;
plot(xy(:,1),xy(:,2),'.');  axis equal; hold on;

To something like that (illustration that i tried to draw :)...):

Answer 1

[Image Analyst]

If you write the points into a digital image you could use imdilate (to thicken the wall) then use bwboundaries to get the (x,y) coordinates of the inside wall. Pretty easy but let me know if you can't figure it out. Requires the Image Processing Toolbox.