This is the right way to make a bar graph. We've tried to integrate photos into bar graphs before, but chopping it up like this is really cool. Also good to note is the coloring of the picture--it's a technique I obviously wouldn't use outside of integration with a graphic, but it could be fun to experiment with.
"Nike BYG" [BringYourGame], (Oct., 2016), Branding and Graphic Poster Design by "Feixen" Studio Design, (Switzerland) of Felix Pfäffli (b. 1986, Swiss) / Other proposals, Other Posters ~ "Feixen Studio" is an Independent Design Studio based in Lucerne, (Switzerland).