表面重建是计算机立体视觉中的一个重要研究领域，SFS（shape from shading）是单帧图像立体感增强的有效方法之一。为了更好地利用SFS对图像进行增强，在对朗伯体表面反射模型进行详细分析和对影响3维重建结果的关键因素进行讨论的基础上，提出了一种改进的SFS算法，并给出了具体的步骤和计算方法。实验表明，该算法的确改善了立体显示的效果。

Surface reconstruction is one of the classic problems in computer vision. Extracting surface depth from a shaded image (SFS) is one kind of effective method. In this paper, the Lambertian surface model was analyzed in detail and the key factors touched the result was discussed; based on this, an improved algorithm with particular approach and computational method was proved. Experiments show that our algorithm enhance the perception of stereo display.