Border detection out of regular shape

1 view (last 30 days)
Albert
Albert on 8 Apr 2022
Commented: Albert on 11 Apr 2022
Hi, I have this shape in the plot, but I want to detect the 4 tails sticking out of the square in order to remove them. How could I detect them? I only have a single vector of points (x,y) which are in the plot. Attached is the variable containing the points.
Thanks!
  4 Comments
Albert
Albert on 8 Apr 2022
I have attached the mat file!

Sign in to comment.

Accepted Answer

Matt J
Matt J on 8 Apr 2022
Edited: Matt J on 8 Apr 2022
load data_points
data0=data;
shp=alphaShape(data,0.9);
[~,V]=boundaryFacets(shp);
shp=polyshape(V,'Simplify',true);
Warning: Polyshape has duplicate vertices, intersections, or other inconsistencies that may produce inaccurate or unexpected results. Input data has been modified to create a well-defined polyshape.
for i=[-1,sqrt(2)]
shp=polybuffer(shp,i,'Joint','square');
end
tf=shp.isinterior(data);
data=data(tf,:);
plot(data0(:,1),data0(:,2),'o',data(:,1),data(:,2),'.r'); hold on
  3 Comments

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by