High-precision 3D face normal map generation

In the current field of face reconstruction, the methods of face reconstruction tend to pay more attention to the optimization of the face model, and seldom study the surface details or even the skin realism, which leads to the greatly reduced realistic of the model and can not achieve good application effect. In this paper, we improve the quality of normal map to lay the foundation for the realistic face reconstruction. Based on the existing face reconstruction, the normal mapping of the object surface is reconstructed by image pre-processing and photometric stereo technology for face photos with the same angle and different illumination directions. This paper improves the photometric stereo algorithm to improve the efficiency and effect of normal mapping.