How to write the coordinats from the dpsimplify function into a new data

Question

Sams 2014-5-19

0
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https://ww2.mathworks.cn/matlabcentral/answers/130146-how-to-write-the-coordinats-from-the-dpsimplify-function-into-a-new-data

回答： Image Analyst 2014-5-19

Hi everyone I've got boundaries of an object. Now i'd like to simplify them with the dpsimlify(p,tol) funkction. This works great so far, i can plot it and it looks good. However when I want to write the coordinats of the simplified data into a datastring it doesn't work how I want it to work. I've got this so far:

 for i = 1: length(B)
  p = B{i}; 
  tol = 3; 
  [ps,ix] = dpsimplify(p,tol);
  plot(p(:,2),p(:,1),'k')
  hold on
  plot(ps(:,2),ps(:,1),'r','LineWidth',2);
  legend('original polyline','simplified')
  boundary(i).id = i;
  boundary(i).X = ps(:,2);
  boundary(i).Y = ps(:,1); 
end;

When i do it like this, I get 2024 elements in the boundary data. but the length of B is just 68. Some of the elements of B are doubled in the boundary data . I hope you understand my problem and know how to fix it.

Cheers Sams