Acquiring the reflectance field of a human face

P. Debevec, Tim Hawkins, C. Tchou, H. Duiker, Westley Sarokin, Mark Sagar
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引用次数: 1074

Abstract

We present a method to acquire the reflectance field of a human face and use these measurements to render the face under arbitrary changes in lighting and viewpoint. We first acquire images of the face from a small set of viewpoints under a dense sampling of incident illumination directions using a light stage. We then construct a reflectance function image for each observed image pixel from its values over the space of illumination directions. From the reflectance functions, we can directly generate images of the face from the original viewpoints in any form of sampled or computed illumination. To change the viewpoint, we use a model of skin reflectance to estimate the appearance of the reflectance functions for novel viewpoints. We demonstrate the technique with synthetic renderings of a person's face under novel illumination and viewpoints.
获取人脸的反射场
我们提出了一种获取人脸反射场的方法,并利用这些测量值来渲染光照和视点任意变化下的人脸。我们首先使用光台在密集的入射照明方向采样下,从一小组视点获取人脸图像。然后,我们根据其在照明方向空间上的值为每个观测图像像素构建一个反射函数图像。从反射率函数中,我们可以直接从原始视点生成任何形式的采样或计算照明的人脸图像。为了改变视点,我们使用皮肤反射率模型来估计新视点的反射率函数的外观。我们展示了一个人的脸在新的照明和视点合成渲染技术。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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