Dichromatic reflectance model
From HandWiki
In Shafer's dichromatic reflection model,[1] scene radiance has two components:
- [math]\displaystyle{ L(\lambda) = m_\mathrm{b} c_\mathrm{b}(\lambda) + m_\mathrm{s}c_\mathrm{s}(\lambda) }[/math]
- λ is the wavelength,
- cb is the body (diffuse) reflected component,
- cs is the surface (interface) (specular) reflected component,
- mb and ms are scale factors depending on illumination, view directions and surface orientation.
Separation algorithm
BREN (body reflection essence-neuter) model based
Body essence is an entity invariant to interface reflection, and has two degrees of freedom. The Gaussian coefficient generalizes a conventional simple thresholding scheme, and it provides detailed use of body color similarity.[2]
References
- ↑ Shafer, S.A. Using color to separate reflection components Color: Research and Application, Volume 10, Issue 4, pp. 210-218, December, 1985.
- ↑ C. Je and H.-M. Park. BREN: Body Reflection Essence-Neuter Model for Separation of Reflection Components. Optics Letters, Volume 40, Issue 9, pp. 1940-1943, May 1, 2015.
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