Surface-normals from closed paths

  • Authors:

  • M. J. Brooks

  • Affiliations:

  • Department of Computer Science, University of Essex, Colchester, England

  • Venue:
  • IJCAI'79 Proceedings of the 6th international joint conference on Artificial intelligence - Volume 1
  • Year:
  • 1979

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Abstract

It is now well established that the shading present in an image of an object is a potential source of 3-D shape information. With this in mind, we seek constraints arising out of the assumption that an image portrays an object with a smooth surface. On obtaining a threshold and a depth-invariance constraint (the latter requiring integration around closed curves) we offer a method of shape from shading for the purpose of demonstrating their potential usefulness.