论文标题

可变形的脸反照率模型

A Morphable Face Albedo Model

论文作者

Smith, William A. P., Seck, Alassane, Dee, Hannah, Tiddeman, Bernard, Tenenbaum, Joshua, Egger, Bernhard

论文摘要

在本文中,我们汇集了两条不同的研究链:光度法捕获和统计3D面部外观建模。我们提出了一种新型的轻型捕获和处理管道,用于获取耳对,真正的内在弥漫性和镜面反照率图,以完全考虑照明,相机和几何形状的影响。使用此管道,我们捕获了50张扫描的数据集,并将它们与23张扫描的唯一现有公开可用的反照率数据集(3DRFE)相结合。这使我们能够构建第一个可变形的脸反照率模型。我们认为这是对面部镜面反照率图的变异性的首次统计分析。该模型可以用作替换巴塞尔面部模型(BFM)或火焰的纹理模型的插件,我们可以公开使用该模型。我们确保仔细的光谱校准,以便我们的模型构建在线性SRGB空间中,适用于典型摄像机拍摄的图像的逆渲染。我们以逐个合成的状态进行3DMM拟合管道的状态证明了我们的模型,这是第一个整合镜面映射估计并胜过反照率重建中BFM的模型。

In this paper, we bring together two divergent strands of research: photometric face capture and statistical 3D face appearance modelling. We propose a novel lightstage capture and processing pipeline for acquiring ear-to-ear, truly intrinsic diffuse and specular albedo maps that fully factor out the effects of illumination, camera and geometry. Using this pipeline, we capture a dataset of 50 scans and combine them with the only existing publicly available albedo dataset (3DRFE) of 23 scans. This allows us to build the first morphable face albedo model. We believe this is the first statistical analysis of the variability of facial specular albedo maps. This model can be used as a plug in replacement for the texture model of the Basel Face Model (BFM) or FLAME and we make the model publicly available. We ensure careful spectral calibration such that our model is built in a linear sRGB space, suitable for inverse rendering of images taken by typical cameras. We demonstrate our model in a state of the art analysis-by-synthesis 3DMM fitting pipeline, are the first to integrate specular map estimation and outperform the BFM in albedo reconstruction.

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