of photos for the app to continue to learn from in order to better refine its results. References External links History of WSJ Hedcuts—Article on the artists and history behind the WSJ hedcut portraits Smithsonian National Portrait Gallery—exhibit "Picturing Business in America: Hedcuts in the Wall Street Journal" Kevin Sprouls Blog—Blog showcasing art of Kevin Sprouls, originator of the Hedcut portrait style Square Gear Gimp Tips - Hedcut—Gimp tutorial and equivalent Gimp script Illustration The Wall Street Journal