Go ahead and do every single triangle this way, which should only take a few minutes. Below, you can see I colored her lips accordingly. Thanks to a fellow reader from the comments section, you can simply use the Dropper tool and just keep hitting the Tab key to cycle through the triangles. The concept here is to select each triangle with the Selection tool (F1) and then set the Fill color by using the Color Dropper tool (F7). Unfortunately, this next part is tedious because I can’t find a better way to do it. Also, Ungroup the wireframe, which is actually just a bunch of individual triangles. Below, I selected the wireframe and the image to move them away from the original dots, because manually deleting the dots would be a pain. Now you should have a full wireframe that accentuates details. Then hit Apply to watch the magic happen.

Change the type of diagram to Delaunay Triangulation along with the bounding box of the diagram to Automatic from selected objects.

Select all of the dots and head up to Extensions > Generate from Path > Voronoi Diagram. As you can see below, I’m only doing her face at a pretty low detail. Here’s my finished dot map for the Delaunay triangulation.

Inkscape vector space art