Border is drawn around the ellipse, how to fill now?

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In this tutorial, an ellipse will be outlined. As you can see, a red border will be drawn around. Form such result, how can we fill such surrounded border with white, and the rest of the image as black?
Thanks.

Answers (1)

Chad Greene
Chad Greene on 7 Oct 2014
You could fill the ellipse with a patch or you could use inpolygon to set all pixels inside the polygon to one color, and set all other pixels another color.

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