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Hybrid Face Reflectance, Illumination, and Shape From a Single Image.

Yongjie Zhu, Chen Li, Si Li

    IEEE Transactions on Pattern Analysis and Machine Intelligence
    |May 14, 2021
    PubMed
    Summary

    We introduce HyFRIS-Net, a novel method for estimating face shape, reflectance, and illumination from a single image. This approach achieves realistic albedo and shape recovery, outperforming existing methods.

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    Area of Science:

    • Computer Vision
    • Computer Graphics
    • Machine Learning

    Background:

    • Accurate face modeling from single images is challenging due to complex illumination and reflectance variations.
    • Existing methods often struggle with occlusions and disentangling intrinsic face properties.

    Purpose of the Study:

    • To develop a unified framework for jointly estimating hybrid reflectance and illumination models and refined face shape from a single unconstrained image.
    • To achieve occlusion-free face albedo recovery with disambiguated color.

    Main Methods:

    • Proposed HyFRIS-Net (Hybrid Reflectance and Illumination Network) for joint estimation.
    • Utilized a hybrid representation for reflectance and illumination modeling in parametric and non-parametric spaces.
    • Enforced reflectance consistency and face identity constraints during training.
    • Employed a self-evolving training strategy for general applicability.

    Main Results:

    • Recovered occlusion-free face albedo with disambiguated color.
    • Demonstrated superior performance in modeling photo-realistic face albedo, illumination, and shape compared to state-of-the-art methods.
    • Achieved general applicability on real-world data through self-evolving training.

    Conclusions:

    • HyFRIS-Net effectively models photometric face appearance by jointly estimating reflectance, illumination, and shape.
    • The proposed hybrid representation and constraints enable robust recovery of intrinsic face properties.
    • The method shows significant advantages for realistic face albedo and shape reconstruction from single images.