Given the epipolar parameterisation, the local curvature of
surfaces along 
and 
parameters can be recovered.
Giblin and Weiss [6] showed that if the camera motion is known and is coplanar, the curved surfaces can be recovered uniquely from their apparent contours. This result has been extended for general camera motion by Cipolla and Blake [5], and Vaillant and Faugeras [14]. They showed that the local structure of curved surfaces (e.g. surface normal, surface curvature) can be recovered from three sequential images taken from a calibrated camera with known motions. For reconstructing curved surfaces reliably, these results are combined with B-spline surface patches [15], optimisation processes [2], and with purposive viewpoint control[8]. Unfortunately, all these methods assume that the cameras are calibrated and their motions are known. If the camera motion is unknown and if the camera is uncalibrated, is it still possible to recover curved surfaces just from their apparent contours?