Zhuo Hou
ABSTRACT
The internal structure of hair consists of three layers: the cuticle, the cortex, and the medulla, and there are multiple membrane structures inside the cuticle. Light incident on these subwavelength structures is subject to scattering and interference phenomena, and the reflected highlights vary depending on the viewing angle. This phenomenon of light coloration due to the microstructure is called structural coloring or photonic coloration. It shows a unique specular highlight and determines the magnitude of the specular highlight, which is not observable in the linear optics of CG. In the case of hairs, this structural coloring or photonic coloration occurs in addition to the simple surface reflections and the backscattering lights, which penetrate the hair and are absorbed by the melanin pigment. In the present report, we mainly discuss the effects of the structural coloring first caused by the multi-layered structure in the cuticle region on the hair surface, simulating the electromagnetic field using the NS-FDTD (Non-Standard Finite Difference in Time Domain) method. In addition, we also discuss the backscattering phenomena inside the hair fibers.
Supplemental Material
Available for Download
- Benedikt Bitterli. 2016. Rendering resources. https://benedikt-bitterli.me/resources/.Google Scholar
- James B Cole. 2005. High accuracy nonstandard finite-difference time-domain algorithms for computational electromagnetics: Applications to optics and photonics. Advances in the applications of nonstandard finite difference schemes (2005), 89–189.Google Scholar
- Stephen R Marschner, Henrik Wann Jensen, Mike Cammarano, Steve Worley, and Pat Hanrahan. 2003. Light scattering from human hair fibers. ACM Transactions on Graphics (TOG) 22, 3 (2003), 780–791.Google ScholarDigital Library
- Matt Pharr, Wenzel Jakob, and Greg Humphreys. 2016. Physically based rendering: From theory to implementation. Morgan Kaufmann.Google Scholar
- Kane Yee. 1966. Numerical solution of initial boundary value problems involving Maxwell’s equations in isotropic media. IEEE Transactions on antennas and propagation 14, 3(1966), 302–307.Google ScholarCross Ref
Recommendations
Interactive Rendering of Acquired Materials on Dynamic Geometry Using Frequency Analysis
Shading acquired materials with high-frequency illumination is computationally expensive. Estimating the shading integral requires multiple samples of the incident illumination. The number of samples required may vary across the image, and the image ...
Combining light animation with obscurances for glossy environments: Research Articles
Special Issue: The Very Best Papers from CASA 2004Obscurances is a powerful technique that approximates indirect global illumination in a much faster way than classic methods as radiosity or path tracing. In this method, the local environment of a point or a patch is sampled to estimate the amount of ...
Comments