How can I use Delaunay Triangulation on points of an existing image, avoiding creating a separate graph?

I would like to use delaunay triangulation on extracted fingerprint minutiae image, not a separate graph showing delaunay triangulation. I have searched on Matlab's answer database and have only been able to find a similar question asked in 2010, however an answer was never provided http://www.mathworks.com/matlabcentral/newsreader/view_thread/296361#795895

Plotting over an image background as referenced by http://www.peteryu.ca/tutorials/matlab/plot_over_image_background, however this does not seem like a good solution for what I am trying to accomplish with delaunay triangulation over points of an existing image.

The relevant code within Matlab's R2015 version, displaying two separate figures is as follows:

%Show extracted minutiae within fingerprint

imshow(fpMinutiaePoints);title('Extracted Minutiae');

%Delaunay Triangulation for output minutiae points

DBT = delaunayTriangulation(minutiae_x, minutiae_y);

figure

triplot(DBT);

% Display the Vertex and Triangle labels on the plot

hold on

numtri = size(DBT,1);

trilabels = arrayfun(@(x) {sprintf('T%d', x)}, (1:numtri)');

Htl = text(ic(:,1), ic(:,2), trilabels, 'FontWeight', 'bold','HorizontalAlignment', 'center', 'Color', 'red');

hold off

I would like to combine these two figure outputs to be able to show the delaunay triangulation within the existing fpMinutiaePoints image and not a separate graph.

Any recommendation from those with experience in this area would be appreciated. Thank you.

[Steven Lord]

This looks to be the same as this thread in the newsgroup. I responded there earlier today.

Answer 1

[Walter Roberson]

Replace the

figure

with

hold on

Answer 2

[Mohammad Bhat]

How can I get Adjacency matrix or Graph from Delaunay Triangulation??