An Efficient Representation for Irradiance Environment Maps
link:http://www.eecs.berkeley.edu/~ravir/papers/envmap/envmap.pdf
主要讲针对irradiance environment map计算的优化。
1, irradiance environment map是指在漫反射平面上投射envirnment map情况下,我们可以把env map做一个简化处理。
也就是用spherical harmonics系数将其低频部分保存下来,而且存
储情况就是9个系数。
计算irradiance的公式是:
w是方向,L(w)是environment map在这个方向上的光,那么还有dot(n,w)要计算。
2, 于是针对dot(n,w)也来一遍SH投射,得出一堆系数,这个因为是固定的,所以可以得出结果,参见论文。
3, 然后所需要的东西都已经到位了,可以做lighting计算了,这部分比较赞 :结果做成一个
其中M是:
c是dot(n,w)的SH系数,L是env map的SH系数,这样一个env map就变成了vector*matrix*vector这样的表达。
矩阵这一步我很喜欢,但是觉得实用性很有限。
分享到:
相关推荐
计算机视觉Github开源论文 KALEIDOSCOPE AN EFFICIENT, LEARNABLE REPRE- SENTATION FOR ALL STRUCTURED LINEAR MAPS
We present a new compact but dense representation of scene geometry which is conditioned on the intensity data from a single image and generated from a code consisting of a small number of parameters....
In this paper, we propose an efficient method for constructing and solving the linear subproblem, which is the bottleneck of these direct methods. We compare our method, called Sparse Pose Adjustment...
Learning Representation for Multi-View Data Analysis covers a wide range of applications in the research fields of big data, human-centered computing, pattern recognition, digital marketing, web ...
Local Zernike moments:a new representation for face recogniton
PCA _SIFT A More Distinctive Representation for Local Image Descriptors 经典图像匹配论文
IJCV一区文章,组协同表示;图像集分类;三种分类方式;线性;均值核函数,黎曼核函数;Group Collaborative Representation for Image Set Classification;个人复现的代码,调试可运行分类准确率94%左右;
An Efficient Misalignment Method for Visual Tracking Based on Sparse Representation
Latent Low-Rank Representation for Subspace Segmentation and Feature Extraction ICCV matlab 论文代码
Symmetric low-rank representation for subspace clustering
In recent years, the community has witnessed a surge of research interest and effort regarding the extraction of textual information from natural scenes, a.k.a. scene text detection and recognition....
Cross-Project Transfer Representation Learning for Vulnerable Function Discovery
Class-wise Sparse and Collaborative Patch Representation for Face Recognition
Virtual Material Acquisition and Representation for Computer Graphics 英文无水印原版pdf pdf所有页面使用FoxitReader、PDF-XChangeViewer、SumatraPDF和Firefox测试都可以打开 本资源转载自网络,如有侵权...
深度学习论文Optical Flow Guided Feature A Fast and Robust Motion Representation for Video Action Recognition
ConceptBert的原始论文由 François Gardères、Maryam Ziaeefard、Baptiste Abeloos 和 Freddy Lécué 共同完成,题为《ConceptBert: Concept-Aware Representation for Visual Question Answering》。
K_SVD:An Algorithm for Designing Overcomplete Dictionary for Sparse Representation
联邦图像分类的增强表示法_FedBABU Towards Enhanced Representation for Federated Image Classification.pdf
本资源是 2016 CVPR 文章的代码. 文章原文题目是: A Probabilistic Collaborative Representation based Approach for Pattern Classification