We propose DeepHuman, a deep learning based framework for 3D human reconstruction from a single RGB image. Since this problem is highly intractable, we adopt a stage-wise, coarse-to-fine method consisting of three steps, namely body shape/pose estimation, surface reconstruction and frontal surface detail refinement. Once a body is estimated from the given image, our method generates a dense semantic representation from it. The representations not only encodes body shape and pose but also bridges the 2D image plane and 3D space. An image-guided volume-to-volume translation CNN is introduced to reconstruct the surface given the input image and the dense semantic representation. One key feature of our network is that it fuses different scales of image features into the 3D space through volumetric feature transformation, which helps to recover details of the subject's surface geometry. The details on the frontal areas of the surface are further refined through a normal map refinement network. The normal refinement network can be concatenated with the volume generation network using our proposed volumetric normal projection layer. We also contribute THuman, a 3D real-world human model dataset containing approximately 7000 models. The whole network is trained using training data generated from the dataset. Overall, due to the specific design of our network and the diversity in our dataset, our method enables 3D human reconstruction given only a single image and outperforms state-of-the-art approaches.

提出了一种用于从单个RGB图像进行3D人体重建的基于图像引导的体积到体积的转换CNN，通过SMPL模型生成密集的语义表示来减少与表面几何重建相关的歧义，将不同尺度的图像特征融合到三维空间中，并通过法线细化网络来进一步提高可见面细节的精度，使用所提出的体积法向投影层将其连接到体积生成网络中，并使用其中包含的3D真实世界人体模型数据集进行训练，实验表明该方法在前沿方法中表现优异。

DeepHuman：从单张图像重建3D人体