Abstract
We use a polarimetric camera to record the Stokes parameters and the degree of linear polarization of long-wavelength infrared radiation emitted by human faces. These Stokes images are combined with Fresnel relations to extract the surface normal at each pixel. Integrating over these surface normals yields a three-dimensional facial image. One major difficulty of this technique is that the normal vectors determined from the polarizations are not unique. We overcome this problem by introducing an additional boundary condition on the subject. The major sources of error in producing inversions are noise in the images caused by scattering of the background signal and the ambiguity in determining the surface normals from the Fresnel coefficients.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Kristan P. Gurton, Alex J. Yuffa, and Gorden W. Videen
Opt. Lett. 39(13) 3857-3859 (2014)
Hieu Nguyen, Hien Kieu, Zhaoyang Wang, and Hanh N. D. Le
Appl. Opt. 57(9) 2188-2196 (2018)
Kashif Usmani, Timothy O’Connor, Xin Shen, Pete Marasco, Artur Carnicer, Dipak Dey, and Bahram Javidi
Opt. Express 28(13) 19281-19294 (2020)