The Gestalt psychologists proposed a set of principles through which perceptual systems organise the input they receive so as to perceive objects as bounded units. Good form involves the tendency to perceive a complete regular form from fragmented perceptual input. The origin of the concept can be traced back to Christian von Ehrenfels (1859-1932) with his term ‘Gestaltqualität’, which denoted a perceptual attribute emerging from the way in which the bits and pieces of an image are assembled into a whole object not reducible to the sum of these elements.
See Central coherence, Form perception, Illusory contours, Object unity, Whole is greater than the sum of its parts