A heuristic-based algorithm known as the shading logic algorithm is proposed for recovering shape from shading. The heuristics are derived on the basis of a geometrical interpretation of the M.J. Brooks and B.K.P. Horn (1985) algorithm. An experimental evaluation was performed using synthesized objects, in particular, superquadrics. The advantage of using the superquadrics is that the shape of the objects can be varied incrementally and systematically. Despite the fact that the shading logic algorithm is heuristic based, experimental results show that the proposed algorithm has a better performance than the Brooks and Horn algorithm. In addition, the proposed approach does not seem to suffer the stability problem common to most variational-based methods.
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机译：提出了一种基于启发式的算法，称为阴影逻辑算法，用于从阴影中恢复形状。启发式算法是根据M.J. Brooks和B.K.P. Horn（1985）算法。使用合成对象（特别是超二次方）进行了实验评估。使用超二次曲面的优势在于，对象的形状可以逐步和系统地变化。尽管阴影逻辑算法是基于启发式的，但实验结果表明，该算法具有比Brooks and Horn算法更好的性能。另外，所提出的方法似乎没有遭受大多数基于变分的方法所共有的稳定性问题。
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