Acquiring the reflectance field of a human face

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. Categories and subject descriptors: I.2.10 [Artificial Intelligence]: Vision and Scene Understanding - intensity, color, photometry and th...

• Type: Conference
• Year: 2000
• Where: SIGGRAPH
• Authors: Paul E. Debevec, Tim Hawkins, Chris Tchou, Haarm-Pieter Duiker, Westley Sarokin, Mark Sagar
• Keywords: Computer Graphics, Illumination Directions, Image, Reflectance Functions, SIGGRAPH 2000