roipoly

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Nicolas
Nicolas 2012-1-12
Hi,
I would like to know if it is possible to create a ROI on a current figure.
x=[1 2 3 4 5 6];
y=[7 8 9 10 11 12];
plot(x,y)
Now i would like to define a ROI, is it possible to use roipoly
I='Figure 1'
r=[-20 20]
c=[-20 20]
BW=roipoly(I,r,c)
cheers
nicolas

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回答（1 个）

Image Analyst
Image Analyst 2012-1-12
No. I has to be an image, not a string. And r and c must have at least three points - that would be a triangle. As you have it, r and c define a line, not a polygon.
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Nicolas
Nicolas 2012-1-13
in my ROI, I have a population of points that increase with time, for each new point i want to recalculate the Voronoi and study the evolution of the polygon areas for each point.
Walter Roberson
Walter Roberson 2012-1-13
It sounds to me like you should be working in the dual space from voronoi, namely the delaunay triangulation.

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