The principle of Figure-Ground Segregation was formally introduced by the Danish phenomenologist Edgar Rubin (1915) and later incorporated as a core organizational law by the Gestalt school of psychology, founded by Max Wertheimer, Kurt Koffka, and Wolfgang Köhler. In visual perception, the figure is perceived as a distinct, localized object possessing definitive shape, contour, and phenomenal closer-ness, whereas the ground (or background) is perceived as formless, extended behind the figure, and unshaped.
- Rubin's Vase Experiment: Edgar Rubin famously demonstrated this phenomenon using ambiguous silhouettes where a central white vase can be perceived as the figure against a black ground, or two opposing black faces can be perceived as the figure against a white ground. The visual system cannot process both configurations simultaneously as figures.
- Properties of Figure vs. Ground: Figures appear closer, possess clear boundaries (contours belong to the figure), have more impressive substance, and are more readily remembered than the indefinite, unbounded ground.
- Pragnanz (Law of Good Gestalt): The overarching Gestalt principle stating that psychological organization will always be as 'good,' concise, symmetric, and regular as prevailing conditions allow, directly dictating how a figure emerges from its ground.