Challenges: Mathematical representation of model learning models parameters from data Overview: generative face model space of faces: goals each face represented as high dimensional vector each vector in high dimensional space represents a face Each face consists of shape vector Si Texture vector Ti Shape and texture vectors: Assumption: known point to point corrsp between … Read more1128

# Month: November 2017

## Iterator of set

1 2 3 4 5 6 7 8 9 10 11 12 13 14 |
std::set<int> myset; std::set<int>::iterator it; // insert some values: for (int i = 1; i<10; i++) myset.insert(i * 10); // 10 20 30 40 50 60 70 80 90 it = myset.begin(); // "it" points now to 10 auto prev = it; //"prev" points to 10 prev++; // "prev" points to 20 myset.erase(it); // "it points to myset.end()" If erase, it will point to end() no matter where it is. it = prev; // "it points to 20" it++; // "it points to 30" cout << *prev << endl; // 20 cout << *it << endl; // 30 |

## Commonly Used functions about string

* isalnum() * tolower() more: http://www.cplusplus.com/reference/cctype/

## deformation

Reference http://www.pmp-book.org/download/slides/Deformation.pdf https://zhuanlan.zhihu.com/p/25804146 Deformation energy Geometric energy to strtch and band thin shell from one shape t another as difference between first and second fundamental form First: stretching second: bending Approach: Given constraints (handle position / orientation, find surface that min deformation energy) Linear Approximation Energy based on fundamental forms in non-linear function of displacements … Read moredeformation

## Nov14. Mesh Smoothing

Mesh smoothing: local averaging minimize local gradient energy in 3 dimensions Fourier transform (low pass filter) similar to local averaging idea image convolution F(A*B) = F(A) * F(B) Spectral Analysis In general: extending eigenvalues, eigenvectors to linear operators on (continuous) functions. Fourior transform: approximate signal as weighted sum (linear combination) of sines and cosines of … Read moreNov14. Mesh Smoothing