The Shape From Darkness problem refers to
        using  the shadows cast by a scene to
    reconstruct the structure of the scene.  
    A collection of images associated with different light source positions is
    used.
    Previously published solutions to this problem
    have performed the reconstruction only for cross sections of the
    scene.
    
    We propose a variant of Shape From Darkness which is capable of
    reconstructing the entire 3-D scene.
    In addition,
    this algorithm can be applied to a broader class of light source
    trajectories, including trajectories which mimic the motion of the sun
    during the day.
    
    We present a formal statement of the 3-D problem and some of
    its characteristics, and an algorithm for recovering 
    a surface from shadows.  Experimental results are presented
    and discussed for
    both real data and synthetic data with associated ground truth.