PSY 252 Lecture Notes - Lecture 9: Illusory Contours, Gestalt Psychology, Edge Detection
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Do(cid:374)(cid:859)t (cid:374)eed othe(cid:396) featu(cid:396)es, can recognize object simply by their edges, mugs share the same structural description which is why you can recognize just based on edges. Within category recognition (identification: need to know more than just the edges, use the additional information, colours, features, context, etc. Identifying faces from negative photos: who people are when there not colour. It does(cid:374)(cid:859)t i(cid:373)pai(cid:396) the (cid:271)asi(cid:272) le(cid:448)el of (cid:396)e(cid:272)og(cid:374)itio(cid:374) (cid:271)ut (cid:373)akes it a lot ha(cid:396)de(cid:396) We can recognise objects but not identify the exact one just because still using basic edge detection since contour, shaping, texture is no longer the same. Negation alters lightness and shadows, changing objects 3d geometry (ex. concave, convex) The thing that stays the same is contours and edges when things are put into the negative. Edges are the most basic visual analysis because it always stays the same. Edge based structural descriptions -> basic-level recognition (eg. recognizing that something is a face)
