How to extract the Voronoi cells that fall inside ROI ?

Hello,

if I have a Voronoi diagram and a specified region of interest ROI which is a part of this Voronoi diagram, how can I extract the cells that fall inside this ROI ?

[Stephen23]

Original question by Ali Ashkanani posted on 2020-09-01, retrieved from Google Cache:

How to extract the Voronoi cells that fall inside ROI ?

Hello,

if I have a Voronoi diagram and a specified region of interest ROI which is a part of this Voronoi diagram, how can I extract the cells that fall inside this ROI ?

[Rik]

And here is a capture to the Wayback Machine as well.

[Rena Berman]

(Answers Dev) Restored edit

Answer 1

[KSSV]

Read about inpolygon. https://www.mathworks.com/help/matlab/ref/inpolygon.html

[KSSV]

I you know the indices cant you get the coordinates? Pick the logical indices of points lying inside the ROI. Use

P = [x(idx) y(idx)] ;  % assuming x, y are column vectors