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Filling image area that is bound by a Delaunay triangle

Asked by Abbas Cheddad on 11 May 2016
Hello,
Let's say that we are treating dot patterns obeying some sort of arrangement on a given image. When calling Matlab's delaunay, the output, DT beneath, will be a Nx3 matrix. Then we can use triplot to plot the triangles,
DT = delaunay(x,y);
triplot(DT,y,x);
Is there any way one can fill a triangle (say the first entry of DT) in the existing image (not a plot/patch)?
Below is an image I borrowed from Matlab's documentation to illustrate the issue I am after:
The solid black triangle.
Thanks!

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