An Improved Shape from Shading Algorithm
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(Also cross-referenced as CAR-TR-700) We propose an improved shape from shading (SFS) algorithm which is an extension of the recently published algorithm by Zheng and Chellappa . A markedly more accurate estimate of the azimuth of the illumination source is presented. Depth reconstructio n has been improved upon by using a new set of boundary conditions and adapting a more sophisticated technique for hierarchical implementation of the SFS algorithm. Errors at the boundaries of images and in rotation of the reconstructed images have been c orrected. Typical results on synthetic and real images are presented.