why do i get error of ??? Error using ==> fchcode at 126 The input curve is broken or points are out of order.

i am using a chaincode from the DIPUM toolbox and i have a silhouette of a hand image it is very clear and the function work correctly till the chain code is put on,i have this as a code g = bound2im(b, M, N); [s, su] = bsubsamp(b, 50); cn = connectpoly(s(:, 1), s(:, 2)); c = fchcode(su); is it something to do with the actual image

[Xia Lin]

I also have the same question, sorry,I can't answer it too!

Answer 1

[Yuliang Xiu]

This is because your sequence of points(su) is not in clockwise order.

I implement the clockwise order convert function as follows:

function [x y] = clockwise_order(x,y)
    cx = mean(x);
    cy = mean(y);
    a = atan2(y - cy, x - cx);
    [~, order] = sort(a);
    x = x(order);
    y = y(order);
end

hope this will help you