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.
カニッツァの三角形は主観的輪郭の有名な例だ。
The Kanizsa triangle is a famous example of an illusory contour.
Compound of 主観的 (subjective) + 輪郭 (contour, outline). A calque of the English term 'subjective contour'.