目前graphics,image比较热门的idea来源：
1，view-dependent Apparent Ridges for Line Drawing View-Dependent Precomputed Light Transport Using Nonlinear Gaussian Function Approximations.
2, mutli-scale Multiscale Shape and Detail Enhancement from Multi-light Image Collections Exaggerated Shading for Depicting Shape and Detail
3, 修改已有的公式模型，Flash Photography Enhancement Via Intrinsic Relighting Locally Controllable Stylized Shading
Frequency Domain Normal Map Filtering
4, 基于已有的公式提出一种新的数据结构。Real-time Edge-Aware Image Processing with the Bilateral Grid