2D Geometry Predicts Perceived Visual Curvature in Context-Free Viewing

Figure 1

Most objects represented by line contours in the two-dimensional image plane cover a space that roughly corresponds to the shape of an ellipse. The receptive field structures of visual cortical detectors in the primate brain also cover areas which are roughly elliptic. The height-to-with ratio (), sometimes also called aspect ratio, of 2D shapes is a geometric parameter relative to the visual area covered by a curve.