The face-vase illusion introduced by Rubin (Rubin, 1915) demonstrates how
one can switch back and forth between different interpretations by
assigning borders to either side of contours in an image. Border ownership
assignment is an important step in perception of forms. Zhou et al. (Zhou,
Friedman, & von der Heydt, 2000) suggested that certain neurons in the
visual cortex encode border ownership....