《Table 2 MSE in depth reconstructed from images with specularities, using PPN and PPS methods.We con

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《Photometric stereo for strong specular highlights》

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Finally，we compare our approach with the Lambertian model，the most common model applied in PS and also the method presented by Mecca et al.[37].The last row in Fig.11 shows the outcome of applying the Lambertian model.The deviation from faithful reconstruction over the specular area of the surface can be seen clearly.The comparison between our approach and Ref.[37]is also shown in Fig.12.Our method applies a complete perspective Blinn–Phong model on the three images including both diffuse and specular reflections and lights，while the method in Ref.[37]uses the specular term in the Blinn–Phong model to handle four purely specular images.The excellent results of our method presented in Fig.12（b）in the presence of a high value of specularity，lacking artefacts，show that the proposed method outperforms state-of-the-art approaches such as the one in Ref.[37].MSE values of 3D reconstruction associated with the experiments in Fig.12 are also given in Table 3.