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Abstract : |
In this paper, we present an extremely simple algorithm for shape from shading, which can be implemented in 25 lines of C code 1. The algorithm is very fast, taking.2 seconds on a Sun SparcStation-1 for a 128 \Theta 128 image, and is purely local and highly parallelizable (parallel implementation included). In our approach, we employ a linear approximation of the reflectance function, as used by others. However, the major difference is that we first use the discrete approximations for surface normal, p and q, using finite differences, and then linearize the reflectance function in depth, Z(x; y), instead of p and q. The algorithm has been tested on several synthetic and real images of both Lambertian and specular surfaces,, |
