Invention Grant
- Patent Title: Process for generating bidirectional reflectance distribution functions of gonioapparent materials with limited measurement data
- Patent Title (中): 用有限测量数据生成成像显影材料的双向反射分布函数的过程
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Application No.: US12446993Application Date: 2007-11-19
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Publication No.: US07991596B2Publication Date: 2011-08-02
- Inventor: Larry Eugene Steenhoek
- Applicant: Larry Eugene Steenhoek
- Applicant Address: US DE Wilmington
- Assignee: E.I. du Pont de Nemours and Company
- Current Assignee: E.I. du Pont de Nemours and Company
- Current Assignee Address: US DE Wilmington
- Agent Gann G. Xu
- International Application: PCT/US2007/024179 WO 20071119
- International Announcement: WO2008/063606 WO 20080529
- Main IPC: G06F17/10
- IPC: G06F17/10
Abstract:
A computer-implemented process for generating a bidirectional reflectance distribution function (BRDF) of a gonioapparent material containing effect flake pigments in a solid medium using limited measurement data, comprising the following steps: (A) acquiring and inputting into a computing device (1) photometric data and (2) the refractive index of the solid medium of the gonioapparent material; (B) converting any non-linear photometric data from step A) above to linear photometric data; (C) using the illumination angle and the reflective scattering angle associated with the linear photometric data and the refractive index of the medium to calculate corresponding effect flake angles; (D) fitting the linear photometric data and the effect angle data with an equation; (E) calculating the corresponding effect flake angle needed to calculate the BRDF being generated in step (F); and (F) generating the BRDF from the corresponding effect flake angle from step (E) and the equation developed in step (D).
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