MATLAB: Find intersection of boundary points

bwboundariesdotImage Processing Toolboxintersectionvector

I have set of boundary points which has been acquired through bwboundaris function( it is almost square). Now how to find 4 vertices of the shape.

Best Answer

Use convhull().

Related Solutions

MATLAB: Find the vertices from delaunay triangulation

x = rand(10,1) ; % a randoms data 
y = rand(10,1) ;
dt = delaunayTriangulation(x,y) ;   % delaunay triangulation 
points = dt.Points ;    % points 
tri = dt.ConnectivityList ;    % nodal connectivity 
x = points(:,1) ;  
X = x(tri) ;
y = points(:,2) ;
Y = y(tri) ;

MATLAB: Point in convex hull

Hi,

I would use convhull and inpolygon:

xx = -1:.05:1; yy = abs(sqrt(xx));
[x,y] = pol2cart(xx,yy);
k = convhull(x,y);
hold on
plot(x(k),y(k),'r-',x,y,'b+')
x_test = rand(10,1);
y_test = rand(10,1);
IN = inpolygon(x_test,y_test,x(k),y(k))
plot(x_test(IN),y_test(IN),'g*',x_test(~IN),y_test(~IN),'y*')
hold off

Best Answer

Related Solutions

MATLAB: Find the vertices from delaunay triangulation

MATLAB: Point in convex hull

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