Now showing items 1216-1217 of 1217

    • Zero-Crossings and Spatiotemporal Interpretation in Vision 

      Poggio, Tomaso; Nielsen, Kenneth; Nishihara, Keith (1982-05-01)
      We will briefly outline a computational theory of the first stages of human vision according to which (a) the retinal image is filtered by a set of centre-surround receptive fields (of about 5 different spatial sizes) ...
    • Zero-Crossings on Lines of Curvature 

      Yuille, A. (1984-12-01)
      We investigate the relations between the structure of the image and events in the geometry of the underlying surface. We introduce some elementary differential geometry and use it to define a coordinate system on the ...