How to remove center traingle in a circle image?

How do I remove a center triangle of a circle image? Can any one share ideas?

[KSSV]

Where is the image?

[Image Analyst]

I'm sure we could, like use a mask to erase it

grayImage(triangleMask) = 0;

but you'd get a better answer if you'd read this link and post your image. Usually when people ask for image processing advice they attach an image because it's best to advise people if you're not working blind. For example you've tagged 3-D volumetric data, triangulation, and Simulink and I have no idea if they have anything to do with solving your problem or not. Do they?

[Selva Karna]

KSSV

How to remove center triangles on circle image.?

[Jan]

@Selva: Do you want to avoid to create the diagonal lines? Then please post the code you are using to draw this image. Or do you have the data as pixels of a raster image? Do you want to do this once manually (e.g. by using the erazor in Photoshop) or automatically for thousands of images?

Please post exactly what your inputs are and which problem you want to solve. "remove center triangles on circle image" does not clarify, what exactly a "circle image" is.

[Selva Karna]

Check this code Jan

I have used the code below:

DT = delaunayTriangulation(x,y,z);
[T,Xb] = freeBoundary(DT);
TR = triangulation(T,Xb);

How to avoid that triangle in the center of the circle.

[Image Analyst]

We cannot run your code because you forgot to supply x, y, and z in a .mat file. Please make it easy for us to help you, not hard.