We consider the interactions between edges and intensity distributions in semi-open image neighborhoods surrounding them. Locally this amounts to a kind of figure-ground problem, and we analyze the case of smooth surface occluding one another. Techniques from differential topology permits a classification of edges based on what we call folds and cuts. Intuititively, folds arise when a surface "folds" out of sight, which in turn may "cut" another surface from view. The classification depends on tangency between an edge tangent map and a shading flow field. Examples are included.


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    Title :

    Folds and cuts: how shading flows into edges


    Contributors:


    Publication date :

    2001-01-01


    Size :

    846788 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Folds and Cuts: How Shading Flows Into Edges

    Huggins, P. / Zucker, S. / IEEE | British Library Conference Proceedings | 2001


    Shading Primitives: Finding Folds and Shallow Grooves

    Haddon, J. / Forsyth, D. / IEEE; Computer Society | British Library Conference Proceedings | 1998


    Shading primitives: finding folds and shallow grooves

    Haddon, J. / Forsyth, D. | IEEE | 1998