We present an approach for building an affine representation of an unknown curved object viewed under orthographic projection from images of its occluding contour. It is based on the observation that the projection of a point on a curved, featureless surface can be computed along a special viewing direction that does not belong to the point's tangent plane. We show that by circumnavigating the object on the tangent plane of selected surface points, we can (1) compute two orthogonal projections of every point projecting to the occluding contour during this motion, and (2) compute the affine coordinates of these points. Our approach demonstrates that affine shape of curved objects can be computed directly, i.e., without Euclidean calibration or image velocity and acceleration measurements.<>


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    Title :

    Affine surface reconstruction by purposive viewpoint control


    Contributors:


    Publication date :

    1995-01-01


    Size :

    850476 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Affine Surface Reconstruction by Purposive Viewpoint Control

    Kutulakos, K. / IEEE Computer Society / Technical Committee on Pattern Analysis and Machine Intelligence | British Library Conference Proceedings | 1995



    Occluding Contour Detection Using Affine Invariants and Purposive Viewpoint Control

    Kutulakos, K. N. / Dyer, C. R. / Institute of Electrical and Electronics Engineers; Computer Society | British Library Conference Proceedings | 1994



    Building Global Object Models by Purposive Viewpoint Control

    Kutulakos, K. N. / Seales, W. B. / Dyer, C. R. et al. | British Library Conference Proceedings | 1994