Remem­ber how the Mona Lisa’s famous smile was painted in low spa­tial fre­quen­cies, hence why we inter­pret the face dif­fer­ently depend­ing on where we look?

Now, Mo of Neu­rophi­los­o­phy takes an in-depth look at how our brains inter­pret hybrid images and com­plex visual scenes, shed­ding more light on this effec­tive imag­ing tech­nique. He also links to the hybrid images sec­tion of MIT’s Com­pu­ta­tional Visual Cog­ni­tion Lab which con­tains a fairly mind-boggling gallery of hybrid images.