I decided to experiment with triangulation so I here are the graphics I made. The photo I used is a photo of me.
Firstly, I created two versions. The first one is made by filled triangles while the second one only has the stroke in color.
Then I decided to make the difference between me (the person in the picture) and the background. I did that by combination of the first two versions I already created.
And lastly, I made some modifications and here is the final result.