主しゅ観かん的てき輪りん郭かく

noun

illusory contour; subjective contour

Technical term in visual perception: a perceived edge or shape that is not physically present, created by the brain from surrounding cues.

• カニッツァの三さん角かく形けいは主しゅ観かん的てき輪りん郭かくの有ゆう名めいな例れいだ。

  The Kanizsa triangle is a famous example of an illusory contour.